diff --git a/components.js b/components.js
index f509d7b38a..7ae94c3509 100644
--- a/components.js
+++ b/components.js
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2","require":["clike","markup-templating"],"owner":"gflohr"},"twig":{"title":"Twig","require":"markup","owner":"brandonkelly"},"typescript":{"title":"TypeScript","require":"javascript","alias":"ts","owner":"vkbansal"},"t4-cs":{"title":"T4 Text Templates (C#)","require":["t4-templating","csharp"],"alias":"t4","owner":"RunDevelopment"},"t4-vb":{"title":"T4 Text Templates (VB)","require":["t4-templating","visual-basic"],"owner":"RunDevelopment"},"t4-templating":{"title":"T4 templating","owner":"RunDevelopment"},"vala":{"title":"Vala","require":"clike","owner":"TemplarVolk"},"vbnet":{"title":"VB.Net","require":"basic","owner":"Bigsby"},"velocity":{"title":"Velocity","require":"markup","owner":"Golmote"},"verilog":{"title":"Verilog","owner":"a-rey"},"vhdl":{"title":"VHDL","owner":"a-rey"},"vim":{"title":"vim","owner":"westonganger"},"visual-basic":{"title":"Visual Basic","alias":"vb","owner":"Golmote"},"wasm":{"title":"WebAssembly","owner":"Golmote"},"wiki":{"title":"Wiki markup","require":"markup","owner":"Golmote"},"xeora":{"title":"Xeora","require":"markup","alias":"xeoracube","aliasTitles":{"xeoracube":"XeoraCube"},"owner":"freakmaxi"},"xojo":{"title":"Xojo (REALbasic)","owner":"Golmote"},"xquery":{"title":"XQuery","require":"markup","owner":"Golmote"},"yaml":{"title":"YAML","alias":"yml","owner":"hason"}},"plugins":{"meta":{"path":"plugins/{id}/prism-{id}","link":"plugins/{id}/"},"line-highlight":"Line Highlight","line-numbers":{"title":"Line Numbers","owner":"kuba-kubula"},"show-invisibles":{"title":"Show Invisibles","after":["autolinker","data-uri-highlight"]},"autolinker":"Autolinker","wpd":"WebPlatform Docs","custom-class":{"title":"Custom Class","owner":"dvkndn","noCSS":true},"file-highlight":{"title":"File Highlight","noCSS":true},"show-language":{"title":"Show Language","owner":"nauzilus","noCSS":true,"require":"toolbar"},"jsonp-highlight":{"title":"JSONP Highlight","noCSS":true,"owner":"nauzilus"},"highlight-keywords":{"title":"Highlight Keywords","owner":"vkbansal","noCSS":true},"remove-initial-line-feed":{"title":"Remove initial line feed","owner":"Golmote","noCSS":true},"previewers":{"title":"Previewers","owner":"Golmote"},"autoloader":{"title":"Autoloader","owner":"Golmote","noCSS":true},"keep-markup":{"title":"Keep Markup","owner":"Golmote","after":"normalize-whitespace","noCSS":true},"command-line":{"title":"Command Line","owner":"chriswells0"},"unescaped-markup":"Unescaped Markup","normalize-whitespace":{"title":"Normalize Whitespace","owner":"zeitgeist87","after":"unescaped-markup","noCSS":true},"data-uri-highlight":{"title":"Data-URI Highlight","owner":"Golmote","noCSS":true},"toolbar":{"title":"Toolbar","owner":"mAAdhaTTah"},"copy-to-clipboard":{"title":"Copy to Clipboard Button","owner":"mAAdhaTTah","require":"toolbar","noCSS":true}}};
 if (typeof module !== 'undefined' && module.exports) { module.exports = components; }
\ No newline at end of file
diff --git a/components.json b/components.json
index 0896d8fe7d..70f6ec8da0 100644
--- a/components.json
+++ b/components.json
@@ -158,9 +158,9 @@
 		},
 		"bnf": {
 			"title": "Backus–Naur form",
-			"alias": "rbfn",
+			"alias": "rbnf",
 			"aliasTitles": {
-				"rbfn": "Routing Backus–Naur form"
+				"rbnf": "Routing Backus–Naur form"
 			},
 			"owner": "RunDevelopment"
 		},
diff --git a/package.json b/package.json
index c667d63b42..a18afbe06d 100755
--- a/package.json
+++ b/package.json
@@ -5,10 +5,11 @@
   "main": "prism.js",
   "style": "themes/prism.css",
   "scripts": {
-    "test:runner": "mocha tests/testrunner-tests.js",
+    "test:aliases": "mocha tests/aliases-test.js",
     "test:languages": "mocha tests/run.js",
     "test:plugins": "mocha tests/plugins/**/*.js",
-    "test": "npm run test:runner && npm run test:languages && npm run test:plugins"
+    "test:runner": "mocha tests/testrunner-tests.js",
+    "test": "npm run test:runner && npm run test:languages && npm run test:plugins && npm run test:aliases"
   },
   "repository": {
     "type": "git",
diff --git a/plugins/autoloader/prism-autoloader.js b/plugins/autoloader/prism-autoloader.js
index 6d5f44219e..3d2b689eeb 100644
--- a/plugins/autoloader/prism-autoloader.js
+++ b/plugins/autoloader/prism-autoloader.js
@@ -6,7 +6,7 @@
 	// The dependencies map is built automatically with gulp
 	var lang_dependencies = /*dependencies_placeholder[*/{"javascript":"clike","actionscript":"javascript","arduino":"cpp","aspnet":["markup","csharp"],"bison":"c","c":"clike","csharp":"clike","cpp":"c","coffeescript":"javascript","crystal":"ruby","css-extras":"css","d":"clike","dart":"clike","django":"markup-templating","ejs":["javascript","markup-templating"],"erb":["ruby","markup-templating"],"fsharp":"clike","flow":"javascript","glsl":"clike","gml":"clike","go":"clike","groovy":"clike","haml":"ruby","handlebars":"markup-templating","haxe":"clike","java":"clike","javadoc":["markup","java","javadoclike"],"jolie":"clike","jsdoc":["javascript","javadoclike"],"js-extras":"javascript","jsonp":"json","json5":"json","kotlin":"clike","less":"css","markdown":"markup","markup-templating":"markup","n4js":"javascript","nginx":"clike","objectivec":"c","opencl":"cpp","parser":"markup","php":["clike","markup-templating"],"phpdoc":["php","javadoclike"],"php-extras":"php","plsql":"sql","processing":"clike","protobuf":"clike","pug":["markup","javascript"],"qore":"clike","jsx":["markup","javascript"],"tsx":["jsx","typescript"],"reason":"clike","ruby":"clike","sass":"css","scss":"css","scala":"java","smarty":"markup-templating","soy":"markup-templating","swift":"clike","tap":"yaml","textile":"markup","tt2":["clike","markup-templating"],"twig":"markup","typescript":"javascript","t4-cs":["t4-templating","csharp"],"t4-vb":["t4-templating","visual-basic"],"vala":"clike","vbnet":"basic","velocity":"markup","wiki":"markup","xeora":"markup","xquery":"markup"}/*]*/;
 
-	var lang_aliases = /*aliases_placeholder[*/{"html":"markup","xml":"markup","svg":"markup","mathml":"markup","js":"javascript","adoc":"asciidoc","shell":"bash","rbfn":"bnf","dotnet":"csharp","jinja2":"django","dockerfile":"docker","gamemakerlanguage":"gml","emacs":"lisp","elisp":"lisp","emacs-lisp":"lisp","n4jsd":"n4js","objectpascal":"pascal","ts":"typescript","t4":"t4-cs","vb":"visual-basic","xeoracube":"xeora"}/*]*/;
+	var lang_aliases = /*aliases_placeholder[*/{"html":"markup","xml":"markup","svg":"markup","mathml":"markup","js":"javascript","adoc":"asciidoc","shell":"bash","rbnf":"bnf","dotnet":"csharp","coffee":"coffeescript","jinja2":"django","dockerfile":"docker","gamemakerlanguage":"gml","hs":"haskell","emacs":"lisp","elisp":"lisp","emacs-lisp":"lisp","md":"markdown","n4jsd":"n4js","objectpascal":"pascal","py":"python","rb":"ruby","ts":"typescript","t4":"t4-cs","vb":"visual-basic","xeoracube":"xeora","yml":"yaml"}/*]*/;
 
 	var lang_data = {};
 
diff --git a/plugins/autoloader/prism-autoloader.min.js b/plugins/autoloader/prism-autoloader.min.js
index ccf046bced..0a62fa3231 100644
--- a/plugins/autoloader/prism-autoloader.min.js
+++ b/plugins/autoloader/prism-autoloader.min.js
@@ -1 +1 @@
-!function(){if("undefined"!=typeof self&&self.Prism&&self.document&&document.createElement){var c={javascript:"clike",actionscript:"javascript",arduino:"cpp",aspnet:["markup","csharp"],bison:"c",c:"clike",csharp:"clike",cpp:"c",coffeescript:"javascript",crystal:"ruby","css-extras":"css",d:"clike",dart:"clike",django:"markup-templating",ejs:["javascript","markup-templating"],erb:["ruby","markup-templating"],fsharp:"clike",flow:"javascript",glsl:"clike",gml:"clike",go:"clike",groovy:"clike",haml:"ruby",handlebars:"markup-templating",haxe:"clike",java:"clike",javadoc:["markup","java","javadoclike"],jolie:"clike",jsdoc:["javascript","javadoclike"],"js-extras":"javascript",jsonp:"json",json5:"json",kotlin:"clike",less:"css",markdown:"markup","markup-templating":"markup",n4js:"javascript",nginx:"clike",objectivec:"c",opencl:"cpp",parser:"markup",php:["clike","markup-templating"],phpdoc:["php","javadoclike"],"php-extras":"php",plsql:"sql",processing:"clike",protobuf:"clike",pug:["markup","javascript"],qore:"clike",jsx:["markup","javascript"],tsx:["jsx","typescript"],reason:"clike",ruby:"clike",sass:"css",scss:"css",scala:"java",smarty:"markup-templating",soy:"markup-templating",swift:"clike",tap:"yaml",textile:"markup",tt2:["clike","markup-templating"],twig:"markup",typescript:"javascript","t4-cs":["t4-templating","csharp"],"t4-vb":["t4-templating","visual-basic"],vala:"clike",vbnet:"basic",velocity:"markup",wiki:"markup",xeora:"markup",xquery:"markup"},t={html:"markup",xml:"markup",svg:"markup",mathml:"markup",js:"javascript",adoc:"asciidoc",shell:"bash",rbfn:"bnf",dotnet:"csharp",jinja2:"django",dockerfile:"docker",gamemakerlanguage:"gml",emacs:"lisp",elisp:"lisp","emacs-lisp":"lisp",n4jsd:"n4js",objectpascal:"pascal",ts:"typescript",t4:"t4-cs",vb:"visual-basic",xeoracube:"xeora"},o={},a=document.getElementsByTagName("script"),e="components/";if((a=a[a.length-1]).hasAttribute("data-autoloader-path")){var s=a.getAttribute("data-autoloader-path").trim();0<s.length&&!/^[a-z]+:\/\//i.test(a.src)&&(e=s.replace(/\/?$/,"/"))}else/[\w-]+\.js$/.test(a.src)&&(e=a.src.replace(/[\w-]+\.js$/,"components/"));var u=Prism.plugins.autoloader={languages_path:e,use_minified:!0},r=function(a,e,c){"string"==typeof a&&(a=[a]);var s=0,t=a.length,r=function(){s<t?i(a[s],function(){s++,r()},function(){c&&c(a[s])}):s===t&&e&&e(a)};r()},i=function(l,n,p){var a=function(){var a=!1;0<=l.indexOf("!")&&(a=!0,l=l.replace("!",""));var e,c,s,t,r=o[l];if(r||(r=o[l]={}),n&&(r.success_callbacks||(r.success_callbacks=[]),r.success_callbacks.push(n)),p&&(r.error_callbacks||(r.error_callbacks=[]),r.error_callbacks.push(p)),!a&&Prism.languages[l])m(l);else if(!a&&r.error)k(l);else if(a||!r.loading){r.loading=!0;var i=u.languages_path+"prism-"+l+(u.use_minified?".min":"")+".js";e=i,c=function(){r.loading=!1,m(l)},s=function(){r.loading=!1,r.error=!0,k(l)},(t=document.createElement("script")).src=e,t.async=!0,t.onload=function(){document.body.removeChild(t),c&&c()},t.onerror=function(){document.body.removeChild(t),s&&s()},document.body.appendChild(t)}},e=c[l];e&&e.length?r(e,a):a()},m=function(e){o[e]&&o[e].success_callbacks&&o[e].success_callbacks.length&&o[e].success_callbacks.forEach(function(a){a(e)})},k=function(e){o[e]&&o[e].error_callbacks&&o[e].error_callbacks.length&&o[e].error_callbacks.forEach(function(a){a(e)})};Prism.hooks.add("complete",function(a){a.element&&a.language&&!a.grammar&&"none"!==a.language&&function(a,e){a in t&&(a=t[a]);var c=o[a];c||(c=o[a]={});var s=e.getAttribute("data-dependencies");!s&&e.parentNode&&"pre"===e.parentNode.tagName.toLowerCase()&&(s=e.parentNode.getAttribute("data-dependencies")),s=s?s.split(/\s*,\s*/g):[],r(s,function(){i(a,function(){Prism.highlightElement(e)})})}(a.language,a.element)})}}();
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document&&document.createElement){var c={javascript:"clike",actionscript:"javascript",arduino:"cpp",aspnet:["markup","csharp"],bison:"c",c:"clike",csharp:"clike",cpp:"c",coffeescript:"javascript",crystal:"ruby","css-extras":"css",d:"clike",dart:"clike",django:"markup-templating",ejs:["javascript","markup-templating"],erb:["ruby","markup-templating"],fsharp:"clike",flow:"javascript",glsl:"clike",gml:"clike",go:"clike",groovy:"clike",haml:"ruby",handlebars:"markup-templating",haxe:"clike",java:"clike",javadoc:["markup","java","javadoclike"],jolie:"clike",jsdoc:["javascript","javadoclike"],"js-extras":"javascript",jsonp:"json",json5:"json",kotlin:"clike",less:"css",markdown:"markup","markup-templating":"markup",n4js:"javascript",nginx:"clike",objectivec:"c",opencl:"cpp",parser:"markup",php:["clike","markup-templating"],phpdoc:["php","javadoclike"],"php-extras":"php",plsql:"sql",processing:"clike",protobuf:"clike",pug:["markup","javascript"],qore:"clike",jsx:["markup","javascript"],tsx:["jsx","typescript"],reason:"clike",ruby:"clike",sass:"css",scss:"css",scala:"java",smarty:"markup-templating",soy:"markup-templating",swift:"clike",tap:"yaml",textile:"markup",tt2:["clike","markup-templating"],twig:"markup",typescript:"javascript","t4-cs":["t4-templating","csharp"],"t4-vb":["t4-templating","visual-basic"],vala:"clike",vbnet:"basic",velocity:"markup",wiki:"markup",xeora:"markup",xquery:"markup"},t={html:"markup",xml:"markup",svg:"markup",mathml:"markup",js:"javascript",adoc:"asciidoc",shell:"bash",rbnf:"bnf",dotnet:"csharp",coffee:"coffeescript",jinja2:"django",dockerfile:"docker",gamemakerlanguage:"gml",hs:"haskell",emacs:"lisp",elisp:"lisp","emacs-lisp":"lisp",md:"markdown",n4jsd:"n4js",objectpascal:"pascal",py:"python",rb:"ruby",ts:"typescript",t4:"t4-cs",vb:"visual-basic",xeoracube:"xeora",yml:"yaml"},o={},a=document.getElementsByTagName("script"),e="components/";if((a=a[a.length-1]).hasAttribute("data-autoloader-path")){var s=a.getAttribute("data-autoloader-path").trim();0<s.length&&!/^[a-z]+:\/\//i.test(a.src)&&(e=s.replace(/\/?$/,"/"))}else/[\w-]+\.js$/.test(a.src)&&(e=a.src.replace(/[\w-]+\.js$/,"components/"));var u=Prism.plugins.autoloader={languages_path:e,use_minified:!0},r=function(a,e,c){"string"==typeof a&&(a=[a]);var s=0,t=a.length,r=function(){s<t?i(a[s],function(){s++,r()},function(){c&&c(a[s])}):s===t&&e&&e(a)};r()},i=function(i,l,n){var p=0<=i.indexOf("!");i=i.replace("!","");var a=function(){var a,e,c,s,t=o[i];if(t||(t=o[i]={}),l&&(t.success_callbacks||(t.success_callbacks=[]),t.success_callbacks.push(l)),n&&(t.error_callbacks||(t.error_callbacks=[]),t.error_callbacks.push(n)),!p&&Prism.languages[i])m(i);else if(!p&&t.error)k(i);else if(p||!t.loading){t.loading=!0;var r=u.languages_path+"prism-"+i+(u.use_minified?".min":"")+".js";a=r,e=function(){t.loading=!1,m(i)},c=function(){t.loading=!1,t.error=!0,k(i)},(s=document.createElement("script")).src=a,s.async=!0,s.onload=function(){document.body.removeChild(s),e&&e()},s.onerror=function(){document.body.removeChild(s),c&&c()},document.body.appendChild(s)}},e=c[i=t[i]||i];e&&e.length?r(e,a):a()},m=function(e){o[e]&&o[e].success_callbacks&&o[e].success_callbacks.length&&o[e].success_callbacks.forEach(function(a){a(e)})},k=function(e){o[e]&&o[e].error_callbacks&&o[e].error_callbacks.length&&o[e].error_callbacks.forEach(function(a){a(e)})};Prism.hooks.add("complete",function(a){a.element&&a.language&&!a.grammar&&"none"!==a.language&&function(a,e){a in t&&(a=t[a]);var c=o[a];c||(c=o[a]={});var s=e.getAttribute("data-dependencies");!s&&e.parentNode&&"pre"===e.parentNode.tagName.toLowerCase()&&(s=e.parentNode.getAttribute("data-dependencies")),s=s?s.split(/\s*,\s*/g):[],r(s,function(){i(a,function(){Prism.highlightElement(e)})})}(a.language,a.element)})}}();
\ No newline at end of file
diff --git a/plugins/show-language/prism-show-language.js b/plugins/show-language/prism-show-language.js
index 3a77bc85d0..704306713b 100644
--- a/plugins/show-language/prism-show-language.js
+++ b/plugins/show-language/prism-show-language.js
@@ -11,7 +11,7 @@ if (!Prism.plugins.toolbar) {
 }
 
 // The languages map is built automatically with gulp
-var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","js":"JavaScript","abap":"ABAP","abnf":"Augmented Backus–Naur form","apacheconf":"Apache Configuration","apl":"APL","arff":"ARFF","asciidoc":"AsciiDoc","adoc":"AsciiDoc","asm6502":"6502 Assembly","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","shell":"Bash","basic":"BASIC","bnf":"Backus–Naur form","rbfn":"Routing Backus–Naur form","csharp":"C#","dotnet":"C#","cpp":"C++","cil":"CIL","coffee":"CoffeeScript","cmake":"CMake","csp":"Content-Security-Policy","css-extras":"CSS Extras","django":"Django/Jinja2","jinja2":"Django/Jinja2","dockerfile":"Docker","ebnf":"Extended Backus–Naur form","ejs":"EJS","erb":"ERB","fsharp":"F#","gcode":"G-code","gedcom":"GEDCOM","glsl":"GLSL","gml":"GameMaker Language","gamemakerlanguage":"GameMaker Language","graphql":"GraphQL","hs":"Haskell","hcl":"HCL","http":"HTTP","hpkp":"HTTP Public-Key-Pins","hsts":"HTTP Strict-Transport-Security","ichigojam":"IchigoJam","inform7":"Inform 7","javadoc":"JavaDoc","javadoclike":"JavaDoc-like","javastacktrace":"Java stack trace","jsdoc":"JSDoc","js-extras":"JS Extras","json":"JSON","jsonp":"JSONP","json5":"JSON5","latex":"LaTeX","emacs":"Lisp","elisp":"Lisp","emacs-lisp":"Lisp","lolcode":"LOLCODE","md":"Markdown","markup-templating":"Markup templating","matlab":"MATLAB","mel":"MEL","n1ql":"N1QL","n4js":"N4JS","n4jsd":"N4JS","nand2tetris-hdl":"Nand To Tetris HDL","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","objectpascal":"Object Pascal","php":"PHP","phpdoc":"PHPDoc","php-extras":"PHP Extras","plsql":"PL/SQL","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","py":"Python","q":"Q (kdb+ database)","jsx":"React JSX","tsx":"React TSX","renpy":"Ren'py","rest":"reST (reStructuredText)","rb":"Ruby","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","soy":"Soy (Closure Template)","tap":"TAP","toml":"TOML","tt2":"Template Toolkit 2","ts":"TypeScript","t4-cs":"T4 Text Templates (C#)","t4":"T4 Text Templates (C#)","t4-vb":"T4 Text Templates (VB)","t4-templating":"T4 templating","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","visual-basic":"Visual Basic","vb":"Visual Basic","wasm":"WebAssembly","wiki":"Wiki markup","xeoracube":"XeoraCube","xojo":"Xojo (REALbasic)","xquery":"XQuery","yaml":"YAML","yml":"YAML"}/*]*/;
+var Languages = /*languages_placeholder[*/{"html":"HTML","xml":"XML","svg":"SVG","mathml":"MathML","css":"CSS","clike":"C-like","js":"JavaScript","abap":"ABAP","abnf":"Augmented Backus–Naur form","apacheconf":"Apache Configuration","apl":"APL","arff":"ARFF","asciidoc":"AsciiDoc","adoc":"AsciiDoc","asm6502":"6502 Assembly","aspnet":"ASP.NET (C#)","autohotkey":"AutoHotkey","autoit":"AutoIt","shell":"Bash","basic":"BASIC","bnf":"Backus–Naur form","rbnf":"Routing Backus–Naur form","csharp":"C#","dotnet":"C#","cpp":"C++","cil":"CIL","coffee":"CoffeeScript","cmake":"CMake","csp":"Content-Security-Policy","css-extras":"CSS Extras","django":"Django/Jinja2","jinja2":"Django/Jinja2","dockerfile":"Docker","ebnf":"Extended Backus–Naur form","ejs":"EJS","erb":"ERB","fsharp":"F#","gcode":"G-code","gedcom":"GEDCOM","glsl":"GLSL","gml":"GameMaker Language","gamemakerlanguage":"GameMaker Language","graphql":"GraphQL","hs":"Haskell","hcl":"HCL","http":"HTTP","hpkp":"HTTP Public-Key-Pins","hsts":"HTTP Strict-Transport-Security","ichigojam":"IchigoJam","inform7":"Inform 7","javadoc":"JavaDoc","javadoclike":"JavaDoc-like","javastacktrace":"Java stack trace","jsdoc":"JSDoc","js-extras":"JS Extras","json":"JSON","jsonp":"JSONP","json5":"JSON5","latex":"LaTeX","emacs":"Lisp","elisp":"Lisp","emacs-lisp":"Lisp","lolcode":"LOLCODE","md":"Markdown","markup-templating":"Markup templating","matlab":"MATLAB","mel":"MEL","n1ql":"N1QL","n4js":"N4JS","n4jsd":"N4JS","nand2tetris-hdl":"Nand To Tetris HDL","nasm":"NASM","nginx":"nginx","nsis":"NSIS","objectivec":"Objective-C","ocaml":"OCaml","opencl":"OpenCL","parigp":"PARI/GP","objectpascal":"Object Pascal","php":"PHP","phpdoc":"PHPDoc","php-extras":"PHP Extras","plsql":"PL/SQL","powershell":"PowerShell","properties":".properties","protobuf":"Protocol Buffers","py":"Python","q":"Q (kdb+ database)","jsx":"React JSX","tsx":"React TSX","renpy":"Ren'py","rest":"reST (reStructuredText)","rb":"Ruby","sas":"SAS","sass":"Sass (Sass)","scss":"Sass (Scss)","sql":"SQL","soy":"Soy (Closure Template)","tap":"TAP","toml":"TOML","tt2":"Template Toolkit 2","ts":"TypeScript","t4-cs":"T4 Text Templates (C#)","t4":"T4 Text Templates (C#)","t4-vb":"T4 Text Templates (VB)","t4-templating":"T4 templating","vbnet":"VB.Net","vhdl":"VHDL","vim":"vim","visual-basic":"Visual Basic","vb":"Visual Basic","wasm":"WebAssembly","wiki":"Wiki markup","xeoracube":"XeoraCube","xojo":"Xojo (REALbasic)","xquery":"XQuery","yaml":"YAML","yml":"YAML"}/*]*/;
 
 Prism.plugins.toolbar.registerButton('show-language', function(env) {
 	var pre = env.element.parentNode;
diff --git a/plugins/show-language/prism-show-language.min.js b/plugins/show-language/prism-show-language.min.js
index 9f69c8aed5..feb2c4ce60 100644
--- a/plugins/show-language/prism-show-language.min.js
+++ b/plugins/show-language/prism-show-language.min.js
@@ -1 +1 @@
-!function(){if("undefined"!=typeof self&&self.Prism&&self.document)if(Prism.plugins.toolbar){var r={html:"HTML",xml:"XML",svg:"SVG",mathml:"MathML",css:"CSS",clike:"C-like",js:"JavaScript",abap:"ABAP",abnf:"Augmented Backus–Naur form",apacheconf:"Apache Configuration",apl:"APL",arff:"ARFF",asciidoc:"AsciiDoc",adoc:"AsciiDoc",asm6502:"6502 Assembly",aspnet:"ASP.NET (C#)",autohotkey:"AutoHotkey",autoit:"AutoIt",shell:"Bash",basic:"BASIC",bnf:"Backus–Naur form",rbfn:"Routing Backus–Naur form",csharp:"C#",dotnet:"C#",cpp:"C++",cil:"CIL",coffee:"CoffeeScript",cmake:"CMake",csp:"Content-Security-Policy","css-extras":"CSS Extras",django:"Django/Jinja2",jinja2:"Django/Jinja2",dockerfile:"Docker",ebnf:"Extended Backus–Naur form",ejs:"EJS",erb:"ERB",fsharp:"F#",gcode:"G-code",gedcom:"GEDCOM",glsl:"GLSL",gml:"GameMaker Language",gamemakerlanguage:"GameMaker Language",graphql:"GraphQL",hs:"Haskell",hcl:"HCL",http:"HTTP",hpkp:"HTTP Public-Key-Pins",hsts:"HTTP Strict-Transport-Security",ichigojam:"IchigoJam",inform7:"Inform 7",javadoc:"JavaDoc",javadoclike:"JavaDoc-like",javastacktrace:"Java stack trace",jsdoc:"JSDoc","js-extras":"JS Extras",json:"JSON",jsonp:"JSONP",json5:"JSON5",latex:"LaTeX",emacs:"Lisp",elisp:"Lisp","emacs-lisp":"Lisp",lolcode:"LOLCODE",md:"Markdown","markup-templating":"Markup templating",matlab:"MATLAB",mel:"MEL",n1ql:"N1QL",n4js:"N4JS",n4jsd:"N4JS","nand2tetris-hdl":"Nand To Tetris HDL",nasm:"NASM",nginx:"nginx",nsis:"NSIS",objectivec:"Objective-C",ocaml:"OCaml",opencl:"OpenCL",parigp:"PARI/GP",objectpascal:"Object Pascal",php:"PHP",phpdoc:"PHPDoc","php-extras":"PHP Extras",plsql:"PL/SQL",powershell:"PowerShell",properties:".properties",protobuf:"Protocol Buffers",py:"Python",q:"Q (kdb+ database)",jsx:"React JSX",tsx:"React TSX",renpy:"Ren'py",rest:"reST (reStructuredText)",rb:"Ruby",sas:"SAS",sass:"Sass (Sass)",scss:"Sass (Scss)",sql:"SQL",soy:"Soy (Closure Template)",tap:"TAP",toml:"TOML",tt2:"Template Toolkit 2",ts:"TypeScript","t4-cs":"T4 Text Templates (C#)",t4:"T4 Text Templates (C#)","t4-vb":"T4 Text Templates (VB)","t4-templating":"T4 templating",vbnet:"VB.Net",vhdl:"VHDL",vim:"vim","visual-basic":"Visual Basic",vb:"Visual Basic",wasm:"WebAssembly",wiki:"Wiki markup",xeoracube:"XeoraCube",xojo:"Xojo (REALbasic)",xquery:"XQuery",yaml:"YAML",yml:"YAML"};Prism.plugins.toolbar.registerButton("show-language",function(e){var a=e.element.parentNode;if(a&&/pre/i.test(a.nodeName)){var s,t=a.getAttribute("data-language")||r[e.language]||((s=e.language)?(s.substring(0,1).toUpperCase()+s.substring(1)).replace(/s(?=cript)/,"S"):s);if(t){var o=document.createElement("span");return o.textContent=t,o}}})}else console.warn("Show Languages plugin loaded before Toolbar plugin.")}();
\ No newline at end of file
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document)if(Prism.plugins.toolbar){var r={html:"HTML",xml:"XML",svg:"SVG",mathml:"MathML",css:"CSS",clike:"C-like",js:"JavaScript",abap:"ABAP",abnf:"Augmented Backus–Naur form",apacheconf:"Apache Configuration",apl:"APL",arff:"ARFF",asciidoc:"AsciiDoc",adoc:"AsciiDoc",asm6502:"6502 Assembly",aspnet:"ASP.NET (C#)",autohotkey:"AutoHotkey",autoit:"AutoIt",shell:"Bash",basic:"BASIC",bnf:"Backus–Naur form",rbnf:"Routing Backus–Naur form",csharp:"C#",dotnet:"C#",cpp:"C++",cil:"CIL",coffee:"CoffeeScript",cmake:"CMake",csp:"Content-Security-Policy","css-extras":"CSS Extras",django:"Django/Jinja2",jinja2:"Django/Jinja2",dockerfile:"Docker",ebnf:"Extended Backus–Naur form",ejs:"EJS",erb:"ERB",fsharp:"F#",gcode:"G-code",gedcom:"GEDCOM",glsl:"GLSL",gml:"GameMaker Language",gamemakerlanguage:"GameMaker Language",graphql:"GraphQL",hs:"Haskell",hcl:"HCL",http:"HTTP",hpkp:"HTTP Public-Key-Pins",hsts:"HTTP Strict-Transport-Security",ichigojam:"IchigoJam",inform7:"Inform 7",javadoc:"JavaDoc",javadoclike:"JavaDoc-like",javastacktrace:"Java stack trace",jsdoc:"JSDoc","js-extras":"JS Extras",json:"JSON",jsonp:"JSONP",json5:"JSON5",latex:"LaTeX",emacs:"Lisp",elisp:"Lisp","emacs-lisp":"Lisp",lolcode:"LOLCODE",md:"Markdown","markup-templating":"Markup templating",matlab:"MATLAB",mel:"MEL",n1ql:"N1QL",n4js:"N4JS",n4jsd:"N4JS","nand2tetris-hdl":"Nand To Tetris HDL",nasm:"NASM",nginx:"nginx",nsis:"NSIS",objectivec:"Objective-C",ocaml:"OCaml",opencl:"OpenCL",parigp:"PARI/GP",objectpascal:"Object Pascal",php:"PHP",phpdoc:"PHPDoc","php-extras":"PHP Extras",plsql:"PL/SQL",powershell:"PowerShell",properties:".properties",protobuf:"Protocol Buffers",py:"Python",q:"Q (kdb+ database)",jsx:"React JSX",tsx:"React TSX",renpy:"Ren'py",rest:"reST (reStructuredText)",rb:"Ruby",sas:"SAS",sass:"Sass (Sass)",scss:"Sass (Scss)",sql:"SQL",soy:"Soy (Closure Template)",tap:"TAP",toml:"TOML",tt2:"Template Toolkit 2",ts:"TypeScript","t4-cs":"T4 Text Templates (C#)",t4:"T4 Text Templates (C#)","t4-vb":"T4 Text Templates (VB)","t4-templating":"T4 templating",vbnet:"VB.Net",vhdl:"VHDL",vim:"vim","visual-basic":"Visual Basic",vb:"Visual Basic",wasm:"WebAssembly",wiki:"Wiki markup",xeoracube:"XeoraCube",xojo:"Xojo (REALbasic)",xquery:"XQuery",yaml:"YAML",yml:"YAML"};Prism.plugins.toolbar.registerButton("show-language",function(e){var a=e.element.parentNode;if(a&&/pre/i.test(a.nodeName)){var s,t=a.getAttribute("data-language")||r[e.language]||((s=e.language)?(s.substring(0,1).toUpperCase()+s.substring(1)).replace(/s(?=cript)/,"S"):s);if(t){var o=document.createElement("span");return o.textContent=t,o}}})}else console.warn("Show Languages plugin loaded before Toolbar plugin.")}();
\ No newline at end of file
diff --git a/tests/aliases-test.js b/tests/aliases-test.js
new file mode 100644
index 0000000000..0e35ce9fa4
--- /dev/null
+++ b/tests/aliases-test.js
@@ -0,0 +1,72 @@
+"use strict";
+
+const { assert } = require("chai");
+const PrismLoader = require('./helper/prism-loader');
+const { languages } = require('./../components');
+
+
+function toArray(value) {
+	if (Array.isArray(value)) {
+		return value;
+	} else if (value === undefined) {
+		return [];
+	}
+	return [value];
+}
+
+// the keys of Prism.languages without any loaded languages (basically just a few functions)
+const ignoreKeys = Object.keys(PrismLoader.createEmptyPrism().languages);
+
+
+for (const lang in languages) {
+	if (lang === 'meta') {
+		continue;
+	}
+
+	describe(`Testing language aliases of '${lang}'`, function () {
+
+		if (languages[lang].aliasTitles) {
+			it('- should have all alias titles registered as alias', function () {
+				var aliases = new Set(toArray(languages[lang].alias));
+
+				Object.keys(languages[lang].aliasTitles).forEach(id => {
+					if (!aliases.has(id)) {
+						const titleJson = JSON.stringify(languages[lang].aliasTitles[id]);
+						assert.fail(`The alias '${id}' with the title ${titleJson} is not registered as an alias.`);
+					}
+				});
+			});
+		}
+
+		it('- should known all aliases', function () {
+
+			var loadedLanguages = new Set(Object.keys(PrismLoader.createInstance(lang).languages));
+
+			// check that all aliases are defined
+			toArray(languages[lang].alias).forEach(alias => {
+				assert.isTrue(loadedLanguages.has(alias), `The registered alias '${alias}' is not present.`);
+			});
+
+
+			// remove ignore keys
+			ignoreKeys.forEach(x => loadedLanguages.delete(x));
+
+			// remove language, aliases, and requirements
+			function remove(lang) {
+				loadedLanguages.delete(lang);
+				toArray(languages[lang].alias).forEach(alias => loadedLanguages.delete(alias));
+
+				// remove recursively
+				toArray(languages[lang].require).forEach(id => remove(id));
+			}
+			remove(lang);
+
+
+			// there should be nothing left
+			if (loadedLanguages.size > 0) {
+				const unregisteredAliases = `(${loadedLanguages.size}) ${JSON.stringify([...loadedLanguages])}`;
+				assert.fail(`There are unregistered aliases: ${unregisteredAliases}`);
+			}
+		});
+	});
+}