Labels are manually added and should be Translatable
Currently its not possible to translate labels.
Labels are the only option for sitewide tagging / categorizing. (Rest of the category / categories are for specific modules - for example - category for posts are different from category for video).
The response related to translating labels - (at link - unacms dot com/d/labels-and-channels-translations-custom ) was that
1 - no, the Labels are untranslatable now because it is possible for the users to introduce the labels too.
But Categories (plural) can also be added / created by user and this is translatable from the Studio > Forms > Categories.
So please, make labels translatable.. Else we will end up with "current affairs", "actualités", "текущие дела" and more labels where only one would be enough...