User blog comment:Brandon Rhea/How we're testing the fandom.com domain migration/@comment-24361909-20180928215953/@comment-1117661-20180929203029

There's also that .pl, .de, .fr etc. are regional domain suffixes, rather than language ones. Ukrainian language has a code of 'uk', but .uk is for United Kingdom and .ua for Ukraine, and there are more examples like this. They're called "Country code top-level domains" for a reason ;)