Does not translate labels in attributes if the site has more than 2 languages

[aprinciple]

I have 3 languages and the translation in the attributes for labels only works for 2 languages, the 3rd language is replaced by the main one

In theory it should be like this [:en]Color[:ru]Цвет[:3rd]Translate for 3rd lang[:]

P.S. This shows on update / save, then shows normal text, I write text, not code in brackets