A qualitative study conducted by semi-structured interviews with youth recreation leaders in a city in Västerbotten’s county in Sweden. The aim is to establish a greater knowledge regarding the youth recreation leader’s experiences of Swedish teenagers’ (17-25) reasons of use of multi-ethnical language among the teenagers, specifically with focus on certain categories as calques, slang words, non-inversion and broad generalization of prepositions. Previous studies from earlier years of the 2000’s have been set in the Southern parts of Sweden as cities as Göteborg, Malmö and Borås – which makes this survey relevant as a way of broadening the knowledge regarding multi-ethnical language among youths in Sweden. The survey was conducted at two youth recreation centres with four youth recreation leaders. The result supports that there are similarities with the slang words and calques used by young people in Southern parts of Sweden as in the Northern – just as some words seem to differ. The common understanding among the participating youth recreation leaders of why the youth recreation centres’ teenagers choose to speak multi-ethnical language is to mark group identity, as a camouflaging pseudo-language to exclude others as adults – or to show more affiliations in relations with closer friends.