Rendoosian language

Rendoosian (Rendoosi) is a language isolate that is spoken by the Rendoosians, an ethnic group in the Eastern Balkans, and is the official language of Rendoosia. The mainstream theory on its origin is that early forms of it were developed before the arrival of Indo-Europeans. After the arrival of Ottomans, converts to Islam developed their own language derived from Rendoosian, called Grimzim, the official language of Grimzimistan. Despite its status as a language isolate, a significant amount of its vocabulary is derived from Slavic and Romance, and the Greek languages, and Latin is used to write it. On the other hand, Grimzim derives much of its vocabulary from Turkish, Persian, and Arabic.