Genootschap Onze Taal (Society for our language) is a Dutch society dedicated to the Dutch language. It was founded in 1931, initially to guard the language against what was seen as an invasion of Germanisms.
The society publishes a journal, Onze Taal, and a number of regularly appearing booklets on spelling, the most notable of which is the White Booklet. It also has an advisory service, the Taaladviesdienst.
References
Genootschap Onze Taal Wikipedia(Text) CC BY-SA