The primary distinction in obtaining a language pack is your specific type of Office 2016 installation: Click-to-Run or MSI. Mixing these up is the most common cause of installation errors.
Under the Choose Display and Help languages section, ensure that Serbian is moved to the top of the list or selected as your primary default. microsoft office 2016 language pack serbian
A: While Serbian (Latin) is listed as a primary language in some older documentation, its full support was primarily for proofing tools (spell check, etc.). The main available interface pack is documented for Serbian (Cyrillic). The primary distinction in obtaining a language pack