In this article on the Language in Interaction NEMO Kennislink themepage: Persons who live abroad for longer periods of time may start to notice their native language knowledge declining. This can be very confrontational. Language scientists investigate how, why and when this may happen and what could be done about it. (in Dutch):
https://www.nemokennislink.nl/publicaties/graven-naar-je-weggezakte-moedertaal/
