There is English and Russian (which is speaken a lot in Ukraine) , i think even the presence of Russian language is already a big win and should be enough , at least for ukrainian gamers that do not speak english.
(in the end you can always check for mods for ukr translation)
But answering your question
" it is possible Ukrainian language to be added? "
Ofc it is possible , since there are different languages in the game , so i guess you wanted to ask if Devs will consider adding that language to the game, which is already a different question , not trying to be a pessimist but i doubt that it will happen , since even now we get a patch each 2+ months with so little content that it seems that modders are working harder on their mods then devs on the game itself)