I am having the same problem. It is not related to cookies, opening minecraft.net in private browsing mode yields the same results. The issue seems to be that minecraft.net does not respect the order of browser's language preferences.
In Lithuania, by default, language preferences are set in this order: lt, en-us, en, ru, pl. However, minecraft.net always defaults to Polish, regardless of where in the list pl is. If pl is removed, the site always defaults to Russian, again, ignoring the order of the list.
Correct behavior should be minecraft.net picking the first language in the list (lt). If the language is not supported, then moving on to the next one (en-us), until a supported one is found.
I am having the same problem. It is not related to cookies, opening minecraft.net in private browsing mode yields the same results. The issue seems to be that minecraft.net does not respect the order of browser's language preferences.
In Lithuania, by default, language preferences are set in this order: lt, en-us, en, ru, pl. However, minecraft.net always defaults to Polish, regardless of where in the list pl is. If pl is removed, the site always defaults to Russian, again, ignoring the order of the list.
Correct behavior should be minecraft.net picking the first language in the list (lt). If the language is not supported, then moving on to the next one (en-us), until a supported one is found.