Serbian has 2 alphabets, Latin and Cyrillic.
Is Latin supported and how to get it ?
According to this post:
it should work with explicit longer language code
instead of just ‘sr’ there are ‘sr-Latn’ and ‘sr-Cyrl’.
But even with sr-Latn it still translates in the cyrillic alphabet.
This question is not yet answered, be the first one who answer using the comment. Later the confirmed answer will be published as the solution.