Her parents spoke Upper Sorbian to her, but her linguistic environment was German.
[1] Koreng studied German studies after her Abitur in Leipzig and worked as a teacher and choirmaster at the Sorbisches Gymnasium (the only Upper Sorbian-language highschool) in Bautzen for two years afterwards.
After the Wende in 1992, she started working as a freelance journalist at Sorbischer Rundfunk, a Sorbian-language radio program.
[2][3] Her show was awarded the third prize in the International Television and Radio Festival of National Minorities, in which more than 60 European ethnic groups participate.
During the electoral period of 2015–2019, she was a member of the board of the Foundation for the Sorbian People (Stiftung für das sorbische Volk).