Microsoft provides official ways to add Croatian support to Office 2016 without using third-party repacks: Language Accessory Packs (LAPs)
: Includes the Croatian spell checker, dictionary, and grammar tools necessary for professional document editing. microsoft office 2016 croatian language pack repack
This is complex but yields a 100% clean, malware-free, personalized repack. Microsoft provides official ways to add Croatian support
For individuals using standard or repacked versions, the configuration follows these steps within any Office 2016 application: microsoft office 2016 croatian language pack repack
: Get technical support and documentation in your preferred language.