Dr. Onur Özsoy is a researcher in the BMBF collaboration project Diagnosis of language abilities in multilingual children: Validation of a test battery (SPEAK) / Research area 2 Language development and multilingualism. 

His research focuses on language production, language processing, language acquisition, (morpho-)syntax, multilingualism and heritage languages. In the framework of RUEG’s project 10, Onur Özsoy specializes on heritage Turkish in Germany and the United States. He explores the underlying dynamics of aspect and (pro-)nominal reference in heritage languages.