The aim of this study was to investigate, illuminate and discuss teacher’s and multilingual student’s view on the connection between their mother tongue and their learning of other languages. This qualitative study is based on interviews with eight students in the 8th grade and two language-teachers from the same school, as well as ethnographic observations during English and Swedish lessons. With the help of some relevant theories, the empirical study is compared, analyzed and interpreted. The results show that the theories and informant’s view on the connection between the mother tongue and other languages are similar, which is that the mother tongue must be fully established before a new language can be taken in.