There has been some discussion about collecting sentences for Serbian. See here.
- Here are 6747 sentences. These are from SETimes, a public domain news site.
- Here is a list of the top-5000 utterances from OpenSubtitles. These will need to be checked for orthography and to make sure that they are public domain (e.g. do not contain any identifiable proper names).
I have included both Latin and Cyrillic.