As a postdoctoral researcher at the Fryske Akademy I investigate the phonology and phonetics of bilingualism. Native Frisian speakers are all bilingual with Dutch. To what extent does the sound system of Frisian influence the pronunciation of Dutch? And vice versa, to what extent does the sound system of Dutch influence the pronunciation–and in the long term–sound change of Frisian? By a series of experiments and the collection of corpora of spoken Frisian, I will study different aspects of the sound system of current spoken Frisian.