If you are looking to change the display language of your Office suite to Croatian, you likely need the Microsoft Office 2013 Language Interface Pack (LIP). This pack allows you to change the ribbon, menus, and help settings to Croatian without reinstalling the entire software.
Microsoft still hosts specific update packages for language packs. If you already have a language pack but need it fully updated, you can find the Service Pack 1 for Microsoft Office 2013 Language Pack on the official download center. microsoft office 2013 croatian language pack free
If you cannot find the standalone installer, you can try adding it directly through the application settings: Open any Office app (like Word or Excel). Navigate to File > Options > Language. How to Get the Microsoft Office 2013 Croatian
Croatian language pack are largely retired. Most current links point only to Service Pack 1 which updates an already installed pack but may not provide the pack itself for free. Microsoft Support WPS Office LibreOffice that include free Croatian language support? Fix: Go to Control Panel > Region >