Ukraine Domain Name Україна доменних імен
UANIC, Ukrainian Network Information Center, Український Мережевий Інформаційний Центр
http://УМІЦ.укр/?lang=UK
In the opening html tag UANIC have the language attribute set to the language tag uk-UK <html lang="uk-UK">. This is incorrect. It should be lang="uk" or lang="uk-UA". The lang tag uk-UA consists of the subtags uk and UA, where uk = Ukrainian language and UA = Ukraine, the country. So, it can be read as: "the Ukrainian language as used in Ukraine".
Richard Ishida's online language tag utility is very useful tool for validating language tags ➜
https://r12a.github.io/app-subtags/index.html Entering uk-UK into the check box and clicking the check button, results in the error message "Region subtag UK not found."
There is an article which explains how to construct valid language tags and the purpose of multiple subtags ➜
https://www.w3.org/International/articles/language-tags
André Schappo
https://u24.gov.ua