To form a sustainable link and coordinate between current and future projects connected with language diversity and multilingualism in Dutch cities, a central organisation is required, both physically and online: I The Netherlands Urban Field Station i . An exemplary output of such research is provided by [14] of the Endangered Languages Alliance in New York: their (digital) map of language diversity in the city led to hundreds of language communities being quite literally put on the map. Such forms of language use are still too often and unjustly viewed as deficient mixtures of "legitimate" languages (e.g. [20], [1]).[8] How can we make language diversity in cities visible?. [Extracted from the article]