Add Swedish translations to countries.json (both common and official)

[aleksitaipale]

This pull request adds the Swedish translations to countries.json, both official ones as well as common ones.

The common names have been sourced from the ISO 3166 article on Swedish Wikipedia.

The official names have been sourced from the Swedish Wikipedia pages of individual countries. Hence, for example Finland becomes Republiken Finland, as it is defined in Finland's Wikipedia article. In these articles, the preceding text "officiellt" (officially) or "formellt" (formally) signifies the official naming.

When no official naming has been provided in the Wikipedia article, I have kept both the common and official name the same.

If I'm missing something or something is wrong, do say! :)

P.S. I know that in #170 there was an intent to add all the Scandinavian languages. However, no official names were provided then and the PR got closed. This PR only adds Swedish, but also includes the official names.

[mledoze]

Hello @aleksitaipale, thank you for this pull request and your great work.
I will review it this week.

[mledoze]

Could you please keep the alphabetical order of the translations keys and add an entry in the changelog?
Thank you

[aleksitaipale]

Thank you for the quick reply! @mledoze, I have now updated the changelog in 90eb437, and ordered the swe translation keys to their correct position in 8b96ce7. :)

[mledoze]

It's merged, thank you for your work.

The official names have been sourced from the Swedish Wikipedia pages of individual countries.

Did you do this manually or with a script?

[aleksitaipale]

Hi, thanks for checking this out!

Unfortunately I sourced the official names manually, one-by-one. :P For the common . names I used a script that parsed the Wikipedia table, if I recall correctly. But there was no such table for the official names, sadly.