diff --git a/.gitignore b/.gitignore
index 564055b328f2..62bf91f0305a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /book/
-/target/
+target/
+po/messages.pot
diff --git a/TRANSLATIONS.md b/TRANSLATIONS.md
new file mode 100644
index 000000000000..207976d22ce6
--- /dev/null
+++ b/TRANSLATIONS.md
@@ -0,0 +1,116 @@
+# Translations of Comprehensive Rust 🦀
+
+We would love to have your help with translating the course into other
+languages! We use the [Gettext] system for translations. This means that you
+don't modify the Markdown files directly: instead you modify `.po` files in a
+`po/` directory. The `.po` files are small text-based translation databases.
+
+There is a `.po` file for each language. They are named after the [ISO 639]
+language codes: Danish would go into `po/da.po`, Korean would go into
+`po/ko.po`, etc. The `.po` files contain all the English text plus the
+translations. They are initialized from a `messages.pot` file (a PO template)
+which contains only the English text.
+
+We will show how to update and manipulate the `.po` and `.pot` files using the
+GNU Gettext utilities below.
+
+[Gettext]: https://www.gnu.org/software/gettext/manual/html_node/index.html
+[ISO 639]: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
+
+## I18n Helpers
+
+We use two helpers for the translations:
+
+* `mdbook-xgettext`: This program extracts the English text. It is an mdbook
+  renderer.
+* `mdbook-gettext`: This program translates the book into a target language. It
+  is an mdbook preprocessor.
+
+Install both helpers with the following command from the root of the course:
+
+```shell
+$ cargo install --path i18n-helpers
+```
+
+## Creating and Updating Translations
+
+First, you need to know how to update the `.pot` and `.po` files.
+
+As a general rule, you should never touch the auto-generated `po/messages.pot`
+file. You should also not edit the `msgid` entries in a `po/xx.po` file. If you
+find mistakes, you need to update the original English text instead. The fixes
+to the English text will flow into the `.po` files the next time the translators
+update them.
+
+### Generating the PO Template
+
+To extract the original English text and generate a `messages.pot` file, you run
+`mdbook` with a special renderer:
+
+```shell
+$ MDBOOK_OUTPUT='{"xgettext": {"pot-file": "messages.pot"}}' \
+  mdbook build -d po
+```
+
+You will find the generated POT file as `po/messages.pot`.
+
+### Initialize a New Translation
+
+To start a new translation, first generate the `po/messages.pot` file. Then use
+`msginit` to create a `xx.po` file for the fictional `xx` language:
+
+```shell
+$ msginit -i po/messages.pot -l xx -o po/xx.po
+```
+
+You can also simply copy `po/messages.pot` to `po/xx.po`. Then update the file
+header (the first entry with `msgid ""`) to the correct language.
+
+### Updating an Existing Translation
+
+As the English text changes, translations gradually become outdated. To update
+the `po/xx.po` file with new messages, first extract the English text into a
+`po/messages.pot` template file. Then run
+
+```shell
+$ msgmerge --update po/xx.po po/messages.pot
+```
+
+Unchanged messages will stay intact, deleted messages are marked as old, and
+updated messages are marked "fuzzy". A fuzzy entry will reuse the previous
+translation: you should then go over it and update it as necessary before you
+remove the fuzzy marker.
+
+## Using Translations
+
+This will show you how to use the translations to generate localized HTML
+output.
+
+## Building a Translation
+
+To use the `po/xx.po` file for your output, run the following command:
+
+```shell
+$ MDBOOK_BOOK__LANGUAGE=xx \
+  MDBOOK_PREPROCESSOR__GETTEXT__PO_FILE=po/xx.po \
+  MDBOOK_PREPROCESSOR__GETTEXT__RENDERERS='["html"]' \
+  MDBOOK_PREPROCESSOR__GETTEXT__BEFORE='["svgbob"]' \
+  mdbook build -d book/xx
+```
+
+This will update the book's language to `xx`, it will make the `mdbook-gettext`
+preprocessor become active and tell it to use the `po/xx.po` file, and finally
+it will redirect the output to `book/xx`.
+
+## Serving a Translation
+
+Like normal, you can use `mdbook serve` to view your translation as you work on
+it. You use the same command as with `mdbook build` above, but additionally
+we'll tell `mdbook` to watch the `po/` directory for changes:
+
+```shell
+$ MDBOOK_BOOK__LANGUAGE=xx \
+  MDBOOK_PREPROCESSOR__GETTEXT__PO_FILE=po/xx.po
+  MDBOOK_BUILD__EXTRA_WATCH_DIRS='["po"]'
+  mdbook serve -d book/xx
+```
diff --git a/book.toml b/book.toml
index 32e858438f91..252e5085ea1e 100644
--- a/book.toml
+++ b/book.toml
@@ -8,7 +8,14 @@ title = "Comprehensive Rust 🦀"
 [rust]
 edition = "2021"
 
+[preprocessor.links]
+renderers = ["html"]
+
+[preprocessor.index]
+renderers = ["html"]
+
 [preprocessor.svgbob]
+renderers = ["html"]
 class = "bob"
 
 [output.html]
diff --git a/i18n-helpers/Cargo.lock b/i18n-helpers/Cargo.lock
new file mode 100644
index 000000000000..90697099311d
--- /dev/null
+++ b/i18n-helpers/Cargo.lock
@@ -0,0 +1,1941 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "ammonia"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64e6d1c7838db705c9b756557ee27c384ce695a1c51a6fe528784cb1c6840170"
+dependencies = [
+ "html5ever",
+ "maplit",
+ "once_cell",
+ "tendril",
+ "url",
+]
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "base64"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "block-buffer"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cce20737498f97b993470a6e536b8523f0af7892a4f928cceb1ac5e52ebe7e"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "bstr"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
+dependencies = [
+ "lazy_static",
+ "memchr",
+ "regex-automata",
+]
+
+[[package]]
+name = "bumpalo"
+version = "3.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "572f695136211188308f16ad2ca5c851a712c464060ae6974944458eb83880ba"
+
+[[package]]
+name = "byteorder"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+
+[[package]]
+name = "bytes"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfb24e866b15a1af2a1b663f10c6b6b8f397a84aadb828f12e5b289ec23a3a3c"
+
+[[package]]
+name = "cc"
+version = "1.0.78"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a20104e2335ce8a659d6dd92a51a767a0c062599c73b343fd152cb401e828c3d"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "chrono"
+version = "0.4.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16b0a3d9ed01224b22057780a37bb8c5dbfe1be8ba48678e7bf57ec4b385411f"
+dependencies = [
+ "iana-time-zone",
+ "js-sys",
+ "num-integer",
+ "num-traits",
+ "time",
+ "wasm-bindgen",
+ "winapi",
+]
+
+[[package]]
+name = "clap"
+version = "4.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7db700bc935f9e43e88d00b0850dae18a63773cfbec6d8e070fccf7fef89a39"
+dependencies = [
+ "bitflags",
+ "clap_lex",
+ "is-terminal",
+ "once_cell",
+ "strsim",
+ "termcolor",
+ "terminal_size",
+]
+
+[[package]]
+name = "clap_complete"
+version = "4.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10861370d2ba66b0f5989f83ebf35db6421713fd92351790e7fdd6c36774c56b"
+dependencies = [
+ "clap",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d4198f73e42b4936b35b5bb248d81d2b595ecb170da0bac7655c54eedfa8da8"
+dependencies = [
+ "os_str_bytes",
+]
+
+[[package]]
+name = "codespan-reporting"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3538270d33cc669650c4b093848450d380def10c331d38c768e34cac80576e6e"
+dependencies = [
+ "termcolor",
+ "unicode-width",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+
+[[package]]
+name = "cpufeatures"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28d997bd5e24a5928dd43e46dc529867e207907fe0b239c3477d924f7f2ca320"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb766fa798726286dbbb842f174001dab8abc7b627a1dd86e0b7222a95d929f"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
+[[package]]
+name = "cxx"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d1075c37807dcf850c379432f0df05ba52cc30f279c5cfc43cc221ce7f8579"
+dependencies = [
+ "cc",
+ "cxxbridge-flags",
+ "cxxbridge-macro",
+ "link-cplusplus",
+]
+
+[[package]]
+name = "cxx-build"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5044281f61b27bc598f2f6647d480aed48d2bf52d6eb0b627d84c0361b17aa70"
+dependencies = [
+ "cc",
+ "codespan-reporting",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "scratch",
+ "syn",
+]
+
+[[package]]
+name = "cxxbridge-flags"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61b50bc93ba22c27b0d31128d2d130a0a6b3d267ae27ef7e4fae2167dfe8781c"
+
+[[package]]
+name = "cxxbridge-macro"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39e61fda7e62115119469c7b3591fd913ecca96fb766cfd3f2e2502ab7bc87a5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "digest"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8168378f4e5023e7218c89c891c0fd8ecdb5e5e4f18cb78f38cf245dd021e76f"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
+[[package]]
+name = "elasticlunr-rs"
+version = "3.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b94d9c8df0fe6879ca12e7633fdfe467c503722cc981fc463703472d2b876448"
+dependencies = [
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+]
+
+[[package]]
+name = "env_logger"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
+dependencies = [
+ "humantime",
+ "is-terminal",
+ "log",
+ "regex",
+ "termcolor",
+]
+
+[[package]]
+name = "errno"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f639046355ee4f37944e44f60642c6f3a7efa3cf6b78c78a0d989a8ce6c396a1"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "fastrand"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+dependencies = [
+ "instant",
+]
+
+[[package]]
+name = "filetime"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "windows-sys",
+]
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "form_urlencoded"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9c384f161156f5260c24a097c56119f9be8c798586aecc13afbcbe7b7e26bf8"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
+name = "fsevent-sys"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76ee7a02da4d231650c7cea31349b889be2f45ddb3ef3032d2ec8185f6313fd2"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "futf"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df420e2e84819663797d1ec6544b13c5be84629e7bb00dc960d6917db2987843"
+dependencies = [
+ "mac",
+ "new_debug_unreachable",
+]
+
+[[package]]
+name = "futures-channel"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52ba265a92256105f45b719605a571ffe2d1f0fea3807304b522c1d778f79eed"
+dependencies = [
+ "futures-core",
+ "futures-sink",
+]
+
+[[package]]
+name = "futures-core"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04909a7a7e4633ae6c4a9ab280aeb86da1236243a77b694a49eacd659a4bd3ac"
+
+[[package]]
+name = "futures-macro"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdfb8ce053d86b91919aad980c220b1fb8401a9394410e1c289ed7e66b61835d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "futures-sink"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39c15cf1a4aa79df40f1bb462fb39676d0ad9e366c2a33b590d7c66f4f81fcf9"
+
+[[package]]
+name = "futures-task"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ffb393ac5d9a6eaa9d3fdf37ae2776656b706e200c8e16b1bdb227f5198e6ea"
+
+[[package]]
+name = "futures-util"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "197676987abd2f9cadff84926f410af1c183608d36641465df73ae8211dc65d6"
+dependencies = [
+ "futures-core",
+ "futures-macro",
+ "futures-sink",
+ "futures-task",
+ "pin-project-lite",
+ "pin-utils",
+ "slab",
+]
+
+[[package]]
+name = "generic-array"
+version = "0.14.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bff49e947297f3312447abdca79f45f4738097cc82b06e72054d2223f601f1b9"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi 0.11.0+wasi-snapshot-preview1",
+]
+
+[[package]]
+name = "gitignore"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78aa90e4620c1498ac434c06ba6e521b525794bbdacf085d490cc794b4a2f9a4"
+dependencies = [
+ "glob",
+]
+
+[[package]]
+name = "glob"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
+
+[[package]]
+name = "h2"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f9f29bc9dda355256b2916cf526ab02ce0aeaaaf2bad60d65ef3f12f11dd0f4"
+dependencies = [
+ "bytes",
+ "fnv",
+ "futures-core",
+ "futures-sink",
+ "futures-util",
+ "http",
+ "indexmap",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
+[[package]]
+name = "handlebars"
+version = "4.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "035ef95d03713f2c347a72547b7cd38cbc9af7cd51e6099fb62d586d4a6dee3a"
+dependencies = [
+ "log",
+ "pest",
+ "pest_derive",
+ "serde",
+ "serde_json",
+ "thiserror",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "headers"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3e372db8e5c0d213e0cd0b9be18be2aca3d44cf2fe30a9d46a65581cd454584"
+dependencies = [
+ "base64",
+ "bitflags",
+ "bytes",
+ "headers-core",
+ "http",
+ "httpdate",
+ "mime",
+ "sha1",
+]
+
+[[package]]
+name = "headers-core"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7f66481bfee273957b1f20485a4ff3362987f85b2c236580d81b4eb7a326429"
+dependencies = [
+ "http",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "html5ever"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bea68cab48b8459f17cf1c944c67ddc572d272d9f2b274140f223ecb1da4a3b7"
+dependencies = [
+ "log",
+ "mac",
+ "markup5ever",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "http"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
+name = "http-body"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5f38f16d184e36f2408a55281cd658ecbd3ca05cce6d6510a176eca393e26d1"
+dependencies = [
+ "bytes",
+ "http",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "httparse"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d897f394bad6a705d5f4104762e116a75639e470d80901eed05a860a95cb1904"
+
+[[package]]
+name = "httpdate"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
+
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
+[[package]]
+name = "hyper"
+version = "0.14.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "034711faac9d2166cb1baf1a2fb0b60b1f277f8492fd72176c17f3515e1abd3c"
+dependencies = [
+ "bytes",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "httparse",
+ "httpdate",
+ "itoa",
+ "pin-project-lite",
+ "socket2",
+ "tokio",
+ "tower-service",
+ "tracing",
+ "want",
+]
+
+[[package]]
+name = "i18n-helpers"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "mdbook",
+ "once_cell",
+ "polib",
+ "regex",
+ "semver",
+ "serde_json",
+]
+
+[[package]]
+name = "iana-time-zone"
+version = "0.1.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64c122667b287044802d6ce17ee2ddf13207ed924c712de9a66a5814d5b64765"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "winapi",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0703ae284fc167426161c2e3f1da3ea71d94b21bedbcc9494e92b28e334e3dca"
+dependencies = [
+ "cxx",
+ "cxx-build",
+]
+
+[[package]]
+name = "idna"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e14ddfc70884202db2244c223200c204c2bda1bc6e0998d11b5e024d657209e6"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
+[[package]]
+name = "inotify"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8069d3ec154eb856955c1c0fbffefbf5f3c40a104ec912d4797314c1801abff"
+dependencies = [
+ "bitflags",
+ "inotify-sys",
+ "libc",
+]
+
+[[package]]
+name = "inotify-sys"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e05c02b5e89bff3b946cedeca278abc628fe811e604f027c45a8aa3cf793d0eb"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "io-lifetimes"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46112a93252b123d31a119a8d1a1ac19deac4fac6e0e8b0df58f0d4e5870e63c"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "is-terminal"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28dfb6c8100ccc63462345b67d1bbc3679177c75ee4bf59bf29c8b1d110b8189"
+dependencies = [
+ "hermit-abi",
+ "io-lifetimes",
+ "rustix",
+ "windows-sys",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fad582f4b9e86b6caa621cabeb0963332d92eea04729ab12892c2533951e6440"
+
+[[package]]
+name = "js-sys"
+version = "0.3.60"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49409df3e3bf0856b916e2ceaca09ee28e6871cf7d9ce97a692cacfdb2a25a47"
+dependencies = [
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "kqueue"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c8fc60ba15bf51257aa9807a48a61013db043fcf3a78cb0d916e8e396dcad98"
+dependencies = [
+ "kqueue-sys",
+ "libc",
+]
+
+[[package]]
+name = "kqueue-sys"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8367585489f01bc55dd27404dcf56b95e6da061a256a666ab23be9ba96a2e587"
+dependencies = [
+ "bitflags",
+ "libc",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.139"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
+
+[[package]]
+name = "link-cplusplus"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecd207c9c713c34f95a097a5b029ac2ce6010530c7b49d7fea24d977dede04f5"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "linux-raw-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"
+
+[[package]]
+name = "lock_api"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "mac"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
+
+[[package]]
+name = "maplit"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
+
+[[package]]
+name = "markup5ever"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a2629bb1404f3d34c2e921f21fd34ba00b206124c81f65c50b43b6aaefeb016"
+dependencies = [
+ "log",
+ "phf",
+ "phf_codegen",
+ "string_cache",
+ "string_cache_codegen",
+ "tendril",
+]
+
+[[package]]
+name = "mdbook"
+version = "0.4.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1ed28d5903dde77bd5182645078a37ee57014cac6ccb2d54e1d6496386648e4"
+dependencies = [
+ "ammonia",
+ "anyhow",
+ "chrono",
+ "clap",
+ "clap_complete",
+ "elasticlunr-rs",
+ "env_logger",
+ "futures-util",
+ "gitignore",
+ "handlebars",
+ "log",
+ "memchr",
+ "notify",
+ "notify-debouncer-mini",
+ "once_cell",
+ "opener",
+ "pulldown-cmark",
+ "regex",
+ "serde",
+ "serde_json",
+ "shlex",
+ "tempfile",
+ "tokio",
+ "toml",
+ "topological-sort",
+ "warp",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "mime"
+version = "0.3.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
+
+[[package]]
+name = "mime_guess"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4192263c238a5f0d0c6bfd21f336a313a4ce1c450542449ca191bb657b4642ef"
+dependencies = [
+ "mime",
+ "unicase",
+]
+
+[[package]]
+name = "mio"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
+dependencies = [
+ "libc",
+ "log",
+ "wasi 0.11.0+wasi-snapshot-preview1",
+ "windows-sys",
+]
+
+[[package]]
+name = "new_debug_unreachable"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
+
+[[package]]
+name = "notify"
+version = "5.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed2c66da08abae1c024c01d635253e402341b4060a12e99b31c7594063bf490a"
+dependencies = [
+ "bitflags",
+ "crossbeam-channel",
+ "filetime",
+ "fsevent-sys",
+ "inotify",
+ "kqueue",
+ "libc",
+ "mio",
+ "walkdir",
+ "winapi",
+]
+
+[[package]]
+name = "notify-debouncer-mini"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e23e9fa24f094b143c1eb61f90ac6457de87be6987bc70746e0179f7dbc9007b"
+dependencies = [
+ "crossbeam-channel",
+ "notify",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
+dependencies = [
+ "autocfg",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "num_cpus"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f61fba1741ea2b3d6a1e3178721804bb716a68a6aeba1149b5d52e3d464ea66"
+
+[[package]]
+name = "opener"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ea3ebcd72a54701f56345f16785a6d3ac2df7e986d273eb4395c0b01db17952"
+dependencies = [
+ "bstr",
+ "winapi",
+]
+
+[[package]]
+name = "os_str_bytes"
+version = "6.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ff9f3fef3968a3ec5945535ed654cb38ff72d7495a25619e2247fb15a2ed9ba"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-sys",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"
+
+[[package]]
+name = "pest"
+version = "2.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f6e86fb9e7026527a0d46bc308b841d73170ef8f443e1807f6ef88526a816d4"
+dependencies = [
+ "thiserror",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96504449aa860c8dcde14f9fba5c58dc6658688ca1fe363589d6327b8662c603"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "798e0220d1111ae63d66cb66a5dcb3fc2d986d520b98e49e1852bfdb11d7c5e7"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "984298b75898e30a843e278a9f2452c31e349a073a0ce6fd950a12a74464e065"
+dependencies = [
+ "once_cell",
+ "pest",
+ "sha1",
+]
+
+[[package]]
+name = "phf"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fabbf1ead8a5bcbc20f5f8b939ee3f5b0f6f281b6ad3468b84656b658b455259"
+dependencies = [
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_codegen"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb1c3a8bc4dd4e5cfce29b44ffc14bedd2ee294559a294e2a4d4c9e9a6a13cd"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d5285893bb5eb82e6aaf5d59ee909a06a16737a8970984dd7746ba9283498d6"
+dependencies = [
+ "phf_shared",
+ "rand",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6796ad771acdc0123d2a88dc428b5e38ef24456743ddb1744ed628f9815c096"
+dependencies = [
+ "siphasher",
+]
+
+[[package]]
+name = "pin-project"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad29a609b6bcd67fee905812e544992d216af9d755757c05ed2d0e15a74c6ecc"
+dependencies = [
+ "pin-project-internal",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "069bdb1e05adc7a8990dce9cc75370895fbe4e3d58b9b73bf1aee56359344a55"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pin-project-lite"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
+
+[[package]]
+name = "pin-utils"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
+[[package]]
+name = "polib"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17009af1604eef4137497a743594fbe8f37e52f004cb5d8f7cf5130dc74a5644"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
+[[package]]
+name = "precomputed-hash"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57a8eca9f9c4ffde41714334dee777596264c7825420f521abc92b5b5deb63a5"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "pulldown-cmark"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d9cc634bc78768157b5cbfe988ffcd1dcba95cd2b2f03a88316c08c6d00ed63"
+dependencies = [
+ "bitflags",
+ "memchr",
+ "unicase",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "regex"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
+
+[[package]]
+name = "remove_dir_all"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "rustix"
+version = "0.36.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4feacf7db682c6c329c4ede12649cd36ecab0f3be5b7d74e6a20304725db4549"
+dependencies = [
+ "bitflags",
+ "errno",
+ "io-lifetimes",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
+[[package]]
+name = "rustls-pemfile"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eebeaeb360c87bfb72e84abdb3447159c0eaececf1bef2aecd65a8be949d1c9"
+dependencies = [
+ "base64",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b4b9743ed687d4b4bcedf9ff5eaa7398495ae14e61cba0a295704edbc7decde"
+
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "scoped-tls"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "scratch"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddccb15bcce173023b3fedd9436f882a0739b8dfb45e4f6b6002bee5929f61b2"
+
+[[package]]
+name = "semver"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58bc9567378fc7690d6b2addae4e60ac2eeea07becb2c64b9f218b53865cba2a"
+
+[[package]]
+name = "serde"
+version = "1.0.152"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb7d1f0d3021d347a83e556fc4683dea2ea09d87bccdf88ff5c12545d89d5efb"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.152"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af487d118eecd09402d70a5d72551860e788df87b464af30e5ea6a38c75c541e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.91"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "sha-1"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5058ada175748e33390e40e872bd0fe59a19f265d0158daa551c5a88a76009c"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
+[[package]]
+name = "sha1"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f04293dc80c3993519f2d7f6f511707ee7094fe0c6d3406feb330cdb3540eba3"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
+[[package]]
+name = "shlex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
+
+[[package]]
+name = "siphasher"
+version = "0.3.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7bd3e3206899af3f8b12af284fafc038cc1dc2b41d1b89dd17297221c5d225de"
+
+[[package]]
+name = "slab"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
+
+[[package]]
+name = "socket2"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02e2d2db9033d13a1567121ddd7a095ee144db4e1ca1b1bda3419bc0da294ebd"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "string_cache"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "213494b7a2b503146286049378ce02b482200519accc31872ee8be91fa820a08"
+dependencies = [
+ "new_debug_unreachable",
+ "once_cell",
+ "parking_lot",
+ "phf_shared",
+ "precomputed-hash",
+ "serde",
+]
+
+[[package]]
+name = "string_cache_codegen"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bb30289b722be4ff74a408c3cc27edeaad656e06cb1fe8fa9231fa59c728988"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
+[[package]]
+name = "syn"
+version = "1.0.107"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
+[[package]]
+name = "tendril"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d24a120c5fc464a3458240ee02c299ebcb9d67b5249c8848b09d639dca8d7bb0"
+dependencies = [
+ "futf",
+ "mac",
+ "utf-8",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "terminal_size"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb20089a8ba2b69debd491f8d2d023761cbf196e999218c591fa1e7e15a21907"
+dependencies = [
+ "rustix",
+ "windows-sys",
+]
+
+[[package]]
+name = "thiserror"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "time"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
+dependencies = [
+ "libc",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi",
+]
+
+[[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
+
+[[package]]
+name = "tokio"
+version = "1.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d9f76183f91ecfb55e1d7d5602bd1d979e38a3a522fe900241cf195624d67ae"
+dependencies = [
+ "autocfg",
+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "pin-project-lite",
+ "socket2",
+ "tokio-macros",
+ "windows-sys",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d266c00fde287f55d3f1c3e96c500c362a2b8c695076ec180f27918820bc6df8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tokio-stream"
+version = "0.1.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d660770404473ccd7bc9f8b28494a811bc18542b915c0855c51e8f419d5223ce"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-tungstenite"
+version = "0.17.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f714dd15bead90401d77e04243611caec13726c2408afd5b31901dfcdcb3b181"
+dependencies = [
+ "futures-util",
+ "log",
+ "tokio",
+ "tungstenite",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bb2e075f03b3d66d8d8785356224ba688d2906a371015e225beeb65ca92c740"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "toml"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1333c76748e868a4d9d1017b5ab53171dfd095f70c712fdb4653a406547f598f"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "topological-sort"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea68304e134ecd095ac6c3574494fc62b909f416c4fca77e440530221e549d3d"
+
+[[package]]
+name = "tower-service"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"
+
+[[package]]
+name = "tracing"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
+dependencies = [
+ "cfg-if",
+ "log",
+ "pin-project-lite",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
+dependencies = [
+ "once_cell",
+]
+
+[[package]]
+name = "try-lock"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3528ecfd12c466c6f163363caf2d02a71161dd5e1cc6ae7b34207ea2d42d81ed"
+
+[[package]]
+name = "tungstenite"
+version = "0.17.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e27992fd6a8c29ee7eef28fc78349aa244134e10ad447ce3b9f0ac0ed0fa4ce0"
+dependencies = [
+ "base64",
+ "byteorder",
+ "bytes",
+ "http",
+ "httparse",
+ "log",
+ "rand",
+ "sha-1",
+ "thiserror",
+ "url",
+ "utf-8",
+]
+
+[[package]]
+name = "typenum"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e79c4d996edb816c91e4308506774452e55e95c3c9de07b6729e17e15a5ef81"
+
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
+
+[[package]]
+name = "url"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d68c799ae75762b8c3fe375feb6600ef5602c883c5d21eb51c09f22b83c4643"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
+name = "utf-8"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "walkdir"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
+dependencies = [
+ "same-file",
+ "winapi",
+ "winapi-util",
+]
+
+[[package]]
+name = "want"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
+dependencies = [
+ "log",
+ "try-lock",
+]
+
+[[package]]
+name = "warp"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed7b8be92646fc3d18b06147664ebc5f48d222686cb11a8755e561a735aacc6d"
+dependencies = [
+ "bytes",
+ "futures-channel",
+ "futures-util",
+ "headers",
+ "http",
+ "hyper",
+ "log",
+ "mime",
+ "mime_guess",
+ "percent-encoding",
+ "pin-project",
+ "rustls-pemfile",
+ "scoped-tls",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "tokio",
+ "tokio-stream",
+ "tokio-tungstenite",
+ "tokio-util",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eaf9f5aceeec8be17c128b2e93e031fb8a4d469bb9c4ae2d7dc1888b26887268"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c8ffb332579b0557b52d268b91feab8df3615f265d5270fec2a8c95b17c1142"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "052be0f94026e6cbc75cdefc9bae13fd6052cdcaf532fa6c45e7ae33a1e6c810"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"
diff --git a/i18n-helpers/Cargo.toml b/i18n-helpers/Cargo.toml
new file mode 100644
index 000000000000..adc750292d39
--- /dev/null
+++ b/i18n-helpers/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "i18n-helpers"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+anyhow = "1.0.68"
+mdbook = "0.4.25"
+once_cell = "1.17.0"
+polib = "0.1.0"
+regex = "1.7.0"
+semver = "1.0.16"
+serde_json = "1.0.91"
diff --git a/i18n-helpers/src/bin/mdbook-gettext.rs b/i18n-helpers/src/bin/mdbook-gettext.rs
new file mode 100644
index 000000000000..7c14a8319f30
--- /dev/null
+++ b/i18n-helpers/src/bin/mdbook-gettext.rs
@@ -0,0 +1,230 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! `gettext` for `mdbook`
+//!
+//! This program works like `gettext`, meaning it will translate
+//! strings in your book.
+//!
+//! The translations come from GNU Gettext `xx.po` files. You must set
+//! preprocessor.gettext.po-file to the PO file to use. If unset, a
+//! warning is issued while building the book.
+//!
+//! See `TRANSLATIONS.md` in the repository root for more information.
+
+use anyhow::{anyhow, Context};
+use i18n_helpers::extract_paragraphs;
+use mdbook::book::Book;
+use mdbook::preprocess::{CmdPreprocessor, PreprocessorContext};
+use mdbook::BookItem;
+use polib::catalog::Catalog;
+use polib::po_file;
+use semver::{Version, VersionReq};
+use std::io;
+use std::path::Path;
+use std::process;
+
+fn translate(text: &str, catalog: &Catalog) -> String {
+    let mut output = String::with_capacity(text.len());
+    let mut target_lineno = 1;
+
+    for (lineno, paragraph) in extract_paragraphs(text) {
+        // Fill in blank lines between paragraphs. This is important
+        // for code blocks where blank lines are significant.
+        while target_lineno < lineno {
+            output.push('\n');
+            target_lineno += 1;
+        }
+        // Subtract 1 because the paragraph is missing a final '\n'
+        // due to the splitting in `extract_paragraphs`.
+        target_lineno += paragraph.lines().count() - 1;
+
+        let translated = catalog
+            .find_message(paragraph)
+            .and_then(|msg| msg.get_msgstr().ok())
+            .filter(|msgstr| !msgstr.is_empty())
+            .map(|msgstr| msgstr.as_str())
+            .unwrap_or(paragraph);
+        output.push_str(translated);
+    }
+
+    let suffix = &text[text.trim_end_matches('\n').len()..];
+    output.push_str(suffix);
+    output
+}
+
+fn translate_book(ctx: &PreprocessorContext, mut book: Book) -> anyhow::Result<Book> {
+    let cfg = ctx
+        .config
+        .get_preprocessor("gettext")
+        .ok_or_else(|| anyhow!("Could not read preprocessor.gettext configuration"))?;
+    let path = cfg
+        .get("po-file")
+        .ok_or_else(|| anyhow!("Missing preprocessor.gettext.po-file config value"))?
+        .as_str()
+        .ok_or_else(|| anyhow!("Expected a string for preprocessor.gettext.po-file"))?;
+    let catalog = po_file::parse(Path::new(path))
+        .map_err(|err| anyhow!("{err}"))
+        .with_context(|| format!("Could not parse {path} as PO file"))?;
+
+    book.for_each_mut(|item| match item {
+        BookItem::Chapter(ch) => {
+            ch.content = translate(&ch.content, &catalog);
+            ch.name = translate(&ch.name, &catalog);
+        }
+        BookItem::Separator => {}
+        BookItem::PartTitle(title) => {
+            *title = translate(title, &catalog);
+        }
+    });
+
+    Ok(book)
+}
+
+fn preprocess() -> anyhow::Result<()> {
+    let (ctx, book) = CmdPreprocessor::parse_input(io::stdin())?;
+    let book_version = Version::parse(&ctx.mdbook_version)?;
+    let version_req = VersionReq::parse(mdbook::MDBOOK_VERSION)?;
+    if !version_req.matches(&book_version) {
+        eprintln!(
+            "Warning: The gettext preprocessor was built against \
+             mdbook version {}, but we're being called from version {}",
+            mdbook::MDBOOK_VERSION,
+            ctx.mdbook_version
+        );
+    }
+
+    let translated_book = translate_book(&ctx, book)?;
+    serde_json::to_writer(io::stdout(), &translated_book)?;
+
+    Ok(())
+}
+
+fn main() -> anyhow::Result<()> {
+    if std::env::args().len() == 3 {
+        assert_eq!(std::env::args().nth(1).as_deref(), Some("supports"));
+        // Signal that we support all renderers.
+        process::exit(0);
+    }
+
+    preprocess()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use polib::message::Message;
+
+    fn create_catalog(translations: &[(&str, &str)]) -> Catalog {
+        let mut catalog = Catalog::new();
+        for (msgid, msgstr) in translations {
+            let message = Message::new_singular("", "", "", "", msgid, msgstr);
+            catalog.add_message(message);
+        }
+        catalog
+    }
+
+    #[test]
+    fn test_translate_single_line() {
+        let catalog = create_catalog(&[("foo bar", "FOO BAR")]);
+        assert_eq!(translate("foo bar", &catalog), "FOO BAR");
+    }
+
+    #[test]
+    fn test_translate_single_paragraph() {
+        let catalog = create_catalog(&[("foo bar", "FOO BAR")]);
+        assert_eq!(translate("foo bar\n", &catalog), "FOO BAR\n");
+    }
+
+    #[test]
+    fn test_translate_paragraph_with_leading_newlines() {
+        let catalog = create_catalog(&[("foo bar", "FOO BAR")]);
+        assert_eq!(translate("\n\n\nfoo bar\n", &catalog), "\n\n\nFOO BAR\n");
+    }
+
+    #[test]
+    fn test_translate_paragraph_with_trailing_newlines() {
+        let catalog = create_catalog(&[("foo bar", "FOO BAR")]);
+        assert_eq!(translate("foo bar\n\n\n", &catalog), "FOO BAR\n\n\n");
+    }
+
+    #[test]
+    fn test_translate_multiple_paragraphs() {
+        let catalog = create_catalog(&[("foo bar", "FOO BAR")]);
+        assert_eq!(
+            translate(
+                "first paragraph\n\
+                 \n\
+                 foo bar\n\
+                 \n\
+                 last paragraph\n",
+                &catalog
+            ),
+            "first paragraph\n\
+             \n\
+             FOO BAR\n\
+             \n\
+             last paragraph\n"
+        );
+    }
+
+    #[test]
+    fn test_translate_multiple_paragraphs_extra_newlines() {
+        // Notice how the translated paragraphs have more lines.
+        let catalog = create_catalog(&[
+            (
+                "first\n\
+                 paragraph",
+                "FIRST\n\
+                 TRANSLATED\n\
+                 PARAGRAPH",
+            ),
+            (
+                "last\n\
+                 paragraph",
+                "LAST\n\
+                 TRANSLATED\n\
+                 PARAGRAPH",
+            ),
+        ]);
+        // Paragraph separation is kept intact while translating.
+        assert_eq!(
+            translate(
+                "\n\
+                 first\n\
+                 paragraph\n\
+                 \n\
+                 \n\
+                 \n\
+                 last\n\
+                 paragraph\n\
+                 \n\
+                 \n",
+                &catalog
+            ),
+            "\n\
+             FIRST\n\
+             TRANSLATED\n\
+             PARAGRAPH\n\
+             \n\
+             \n\
+             \n\
+             LAST\n\
+             TRANSLATED\n\
+             PARAGRAPH\n\
+             \n\
+             \n"
+        );
+    }
+}
diff --git a/i18n-helpers/src/bin/mdbook-xgettext.rs b/i18n-helpers/src/bin/mdbook-xgettext.rs
new file mode 100644
index 000000000000..630c8d95f082
--- /dev/null
+++ b/i18n-helpers/src/bin/mdbook-xgettext.rs
@@ -0,0 +1,128 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! `xgettext` for `mdbook`
+//!
+//! This program works like `xgettext`, meaning it will extract
+//! translatable strings from your book. The strings are saved in a
+//! GNU Gettext `messages.pot` file in your build directory (typically
+//! `po/messages.pot`).
+//!
+//! See `TRANSLATIONS.md` in the repository root for more information.
+
+use anyhow::{anyhow, Context};
+use mdbook::renderer::RenderContext;
+use mdbook::BookItem;
+use polib::catalog::Catalog;
+use polib::message::Message;
+use std::fs;
+use std::io;
+
+fn add_message(catalog: &mut Catalog, msgid: &str, source: &str) {
+    let sources = match catalog.find_message(msgid) {
+        Some(msg) => format!("{}\n{}", msg.source, source),
+        None => String::from(source),
+    };
+    let message = Message::new_singular("", &sources, "", "", msgid, "");
+
+    // Carefully update the existing message or add a new one. It's an
+    // error to create a catalog with duplicate msgids.
+    match catalog.find_message_index(msgid) {
+        Some(&idx) => catalog.update_message_by_index(idx, message).unwrap(),
+        None => catalog.add_message(message),
+    }
+}
+
+fn create_catalog(ctx: &RenderContext) -> anyhow::Result<Catalog> {
+    let mut catalog = Catalog::new();
+    if let Some(title) = &ctx.config.book.title {
+        catalog.metadata.project_id_version = String::from(title);
+    }
+    if let Some(lang) = &ctx.config.book.language {
+        catalog.metadata.language = String::from(lang);
+    }
+    catalog.metadata.mime_version = String::from("1.0");
+    catalog.metadata.content_type = String::from("text/plain; charset=UTF-8");
+    catalog.metadata.content_transfer_encoding = String::from("8bit");
+
+    let summary_path = ctx.config.book.src.join("SUMMARY.md");
+    let summary = std::fs::read_to_string(ctx.root.join(&summary_path))?;
+
+    // First, add all chapter names and part titles from SUMMARY.md.
+    // The book items are in order of the summary, so we can assign
+    // correct line numbers for duplicate lines by tracking the index
+    // of our last search.
+    let mut last_idx = 0;
+    for item in ctx.book.iter() {
+        let line = match item {
+            BookItem::Chapter(chapter) => &chapter.name,
+            BookItem::PartTitle(title) => title,
+            BookItem::Separator => continue,
+        };
+
+        let idx = summary[last_idx..].find(line).ok_or_else(|| {
+            anyhow!(
+                "Could not find {line:?} in SUMMARY.md after line {} -- \
+                 please remove any formatting from SUMMARY.md",
+                summary[..last_idx].lines().count()
+            )
+        })?;
+        last_idx += idx;
+        let lineno = summary[..last_idx].lines().count();
+        let source = format!("{}:{}", summary_path.display(), lineno);
+        add_message(&mut catalog, line, &source);
+    }
+
+    // Next, we add the chapter contents.
+    for item in ctx.book.iter() {
+        if let BookItem::Chapter(chapter) = item {
+            let path = match &chapter.path {
+                Some(path) => ctx.config.book.src.join(path),
+                None => continue,
+            };
+            for (lineno, paragraph) in i18n_helpers::extract_paragraphs(&chapter.content)
+            {
+                let source = format!("{}:{}", path.display(), lineno);
+                add_message(&mut catalog, paragraph, &source);
+            }
+        }
+    }
+
+    Ok(catalog)
+}
+
+fn main() -> anyhow::Result<()> {
+    let ctx = RenderContext::from_json(&mut io::stdin()).context("Parsing stdin")?;
+    let cfg = ctx
+        .config
+        .get_renderer("xgettext")
+        .ok_or_else(|| anyhow!("Could not read output.xgettext configuration"))?;
+    let path = cfg
+        .get("pot-file")
+        .ok_or_else(|| anyhow!("Missing output.xgettext.pot-file config value"))?
+        .as_str()
+        .ok_or_else(|| anyhow!("Expected a string for output.xgettext.pot-file"))?;
+    fs::create_dir_all(&ctx.destination)
+        .with_context(|| format!("Could not create {}", ctx.destination.display()))?;
+    let output_path = ctx.destination.join(path);
+    if output_path.exists() {
+        fs::remove_file(&output_path)
+            .with_context(|| format!("Removing {}", output_path.display()))?
+    }
+    let catalog = create_catalog(&ctx).context("Extracting messages")?;
+    polib::po_file::write(&catalog, &output_path)
+        .with_context(|| format!("Writing messages to {}", output_path.display()))?;
+
+    Ok(())
+}
diff --git a/i18n-helpers/src/lib.rs b/i18n-helpers/src/lib.rs
new file mode 100644
index 000000000000..d16ef1fc33ec
--- /dev/null
+++ b/i18n-helpers/src/lib.rs
@@ -0,0 +1,106 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use once_cell::sync::Lazy;
+use regex::Regex;
+
+static PARAGRAPH_SEPARATOR: Lazy<Regex> = Lazy::new(|| Regex::new(r"\n\n+").unwrap());
+
+/// Extract paragraphs from text.
+///
+/// Paragraphs are separated by at least two newlines. Returns an
+/// iterator over line numbers (starting from 1) and paragraphs.
+pub fn extract_paragraphs(text: &str) -> impl Iterator<Item = (usize, &str)> {
+    // TODO: This could be made more sophisticated by parsing the
+    // Markdown and stripping off the markup characters.
+    //
+    // As an example, a header like "## My heading" could become just
+    // "My heading" in the `.pot` file. Similarly, paragraphs could be
+    // unfolded and list items could be translated one-by-one.
+
+    // Skip over leading empty lines.
+    let trimmed = text.trim_start_matches('\n');
+    let mut matches = PARAGRAPH_SEPARATOR.find_iter(trimmed);
+    let mut lineno = 1 + text.len() - trimmed.len();
+    let mut last = 0;
+
+    std::iter::from_fn(move || match matches.next() {
+        Some(m) => {
+            let result = (lineno, &trimmed[last..m.start()]);
+            lineno += trimmed[last..m.end()].lines().count();
+            last = m.end();
+            Some(result)
+        }
+        None => {
+            if last < trimmed.len() {
+                let result = (lineno, trimmed[last..].trim_end_matches('\n'));
+                last = trimmed.len();
+                Some(result)
+            } else {
+                None
+            }
+        }
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    macro_rules! assert_iter_eq {
+        ($left_iter:expr, $right:expr) => {
+            assert_eq!($left_iter.collect::<Vec<_>>(), $right)
+        };
+    }
+
+    #[test]
+    fn test_extract_paragraphs_empty() {
+        assert_iter_eq!(extract_paragraphs(""), vec![]);
+    }
+
+    #[test]
+    fn test_extract_paragraphs_single_line() {
+        assert_iter_eq!(
+            extract_paragraphs("This is a paragraph."),
+            vec![(1, "This is a paragraph.")]
+        );
+    }
+
+    #[test]
+    fn test_extract_paragraphs_simple() {
+        assert_iter_eq!(
+            extract_paragraphs("This is\nthe first\nparagraph.\n\nSecond paragraph."),
+            vec![
+                (1, "This is\nthe first\nparagraph."),
+                (5, "Second paragraph.")
+            ]
+        );
+    }
+
+    #[test]
+    fn test_extract_paragraphs_leading_newlines() {
+        assert_iter_eq!(
+            extract_paragraphs("\n\n\nThis is\na paragraph."),
+            vec![(4, "This is\na paragraph.")]
+        );
+    }
+
+    #[test]
+    fn test_extract_paragraphs_trailing_newlines() {
+        assert_iter_eq!(
+            extract_paragraphs("This is\na paragraph.\n\n\n"),
+            vec![(1, "This is\na paragraph.")]
+        );
+    }
+}
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index e1d9080111dd..6f186b9a2fa6 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -28,19 +28,19 @@
   - [References](basic-syntax/references.md)
     - [Dangling References](basic-syntax/references-dangling.md)
   - [Slices](basic-syntax/slices.md)
-    - [`String` vs `str`](basic-syntax/string-slices.md)
+    - [String vs str](basic-syntax/string-slices.md)
   - [Functions](basic-syntax/functions.md)
     - [Methods](basic-syntax/methods.md)
     - [Overloading](basic-syntax/functions-interlude.md)
 - [Exercises](exercises/day-1/morning.md)
   - [Implicit Conversions](exercises/day-1/implicit-conversions.md)
-  - [Arrays and `for` Loops](exercises/day-1/for-loops.md)
+  - [Arrays and for Loops](exercises/day-1/for-loops.md)
 
 # Day 1: Afternoon
 
 - [Variables](basic-syntax/variables.md)
   - [Type Inference](basic-syntax/type-inference.md)
-  - [`static` & `const`](basic-syntax/static-and-const.md))
+  - [static & const](basic-syntax/static-and-const.md))
   - [Scopes and Shadowing](basic-syntax/scopes-shadowing.md)
 - [Memory Management](memory-management.md)
   - [Stack vs Heap](memory-management/stack-vs-heap.md)
@@ -93,23 +93,23 @@
 
 - [Control Flow](control-flow.md)
   - [Blocks](control-flow/blocks.md)
-  - [`if` expressions](control-flow/if-expressions.md)
-  - [`if let` expressions](control-flow/if-let-expressions.md)
-  - [`while` expressions](control-flow/while-expressions.md)
-  - [`while let` expressions](control-flow/while-let-expressions.md)
-  - [`for` expressions](control-flow/for-expressions.md)
-  - [`loop` expressions](control-flow/loop-expressions.md)
-  - [`match` expressions](control-flow/match-expressions.md)
-  - [`break` & `continue`](control-flow/break-continue.md)
+  - [if expressions](control-flow/if-expressions.md)
+  - [if let expressions](control-flow/if-let-expressions.md)
+  - [while expressions](control-flow/while-expressions.md)
+  - [while let expressions](control-flow/while-let-expressions.md)
+  - [for expressions](control-flow/for-expressions.md)
+  - [loop expressions](control-flow/loop-expressions.md)
+  - [match expressions](control-flow/match-expressions.md)
+  - [break & continue](control-flow/break-continue.md)
 - [Standard Library](std.md)
-  - [`String`](std/string.md)
-  - [`Option` and `Result`](std/option-result.md)
-  - [`Vec`](std/vec.md)
-  - [`HashMap`](std/hashmap.md)
-  - [`Box`](std/box.md)
-    - [`Recursive Data Types`](std/box-recursive.md)
-    - [`Niche Optimization`](std/box-niche.md)
-  - [`Rc`](std/rc.md)
+  - [String](std/string.md)
+  - [Option and Result](std/option-result.md)
+  - [Vec](std/vec.md)
+  - [HashMap](std/hashmap.md)
+  - [Box](std/box.md)
+    - [Recursive Data Types](std/box-recursive.md)
+    - [Niche Optimization](std/box-niche.md)
+  - [Rc](std/rc.md)
 - [Modules](modules.md)
   - [Visibility](modules/visibility.md)
   - [Paths](modules/paths.md)
@@ -128,17 +128,16 @@
   - [Deriving Traits](traits/deriving-traits.md)
   - [Default Methods](traits/default-methods.md)
   - [Important Traits](traits/important-traits.md)
-    - [`Iterator`](traits/iterator.md)
-    - [`FromIterator`](traits/from-iterator.md)
-    - [`From` and `Into`](traits/from-into.md)
-    - [`Read` and `Write`](traits/read-write.md)
-    - [`Add`, `Mul`, ...](traits/operators.md)
-    - [`Drop`](traits/drop.md)
+    - [Iterator](traits/iterator.md)
+    - [FromIterator](traits/from-iterator.md)
+    - [Read and Write](traits/read-write.md)
+    - [Add, Mul, ...](traits/operators.md)
+    - [Drop](traits/drop.md)
 - [Generics](generics.md)
   - [Generic Data Types](generics/data-types.md)
   - [Generic Methods](generics/methods.md)
   - [Trait Bounds](generics/trait-bounds.md)
-  - [`impl Trait`](generics/impl-trait.md)
+  - [impl Trait](generics/impl-trait.md)
   - [Closures](generics/closures.md)
   - [Monomorphization](generics/monomorphization.md)
   - [Trait Objects](generics/trait-objects.md)
@@ -151,7 +150,7 @@
   - [Panics](error-handling/panics.md)
     - [Catching Stack Unwinding](error-handling/panic-unwind.md)
   - [Structured Error Handling](error-handling/result.md)
-  - [Propagating Errors with `?`](error-handling/try-operator.md)
+  - [Propagating Errors with ?](error-handling/try-operator.md)
     - [Converting Error Types](error-handling/converting-error-types.md)
     - [Deriving Error Enums](error-handling/deriving-error-enums.md)
     - [Adding Context to Errors](error-handling/error-contexts.md)
@@ -182,12 +181,12 @@
     - [Unbounded Channels](concurrency/channels/unbounded.md)
     - [Bounded Channels](concurrency/channels/bounded.md)
   - [Shared State](concurrency/shared_state.md)
-    - [`Arc`](concurrency/shared_state/arc.md)
-    - [`Mutex`](concurrency/shared_state/mutex.md)
+    - [Arc](concurrency/shared_state/arc.md)
+    - [Mutex](concurrency/shared_state/mutex.md)
     - [Example](concurrency/shared_state/example.md)
-  - [`Send` and `Sync`](concurrency/send-sync.md)
-    - [`Send`](concurrency/send-sync/send.md)
-    - [`Sync`](concurrency/send-sync/sync.md)
+  - [Send and Sync](concurrency/send-sync.md)
+    - [Send](concurrency/send-sync/send.md)
+    - [Sync](concurrency/send-sync/sync.md)
     - [Examples](concurrency/send-sync/examples.md)
 - [Exercises](exercises/day-4/morning.md)
   - [Dining Philosophers](exercises/day-4/dining-philosophers.md)