A monolingual target language (TL) teaching norm has been promoted in second language learning over recent decades. Despite this, international studies indicate substantial variation in how and why teachers use the TL. This study investigates the extent of TL use during English lessons in Swedish classrooms in primary school, and how the choice of language correlates with teachers’ beliefs regarding second language learning (SLL) and the inclusion of the first language (L1). This study discusses the teachers’ didactic considerations and implementations of languages during their English lessons, and the teachers’ view on how the students are affected by the use of the TL in the classroom. Semi-structured interviews are carried out with three certified primary school English teachers. The interview data from this study show that the teachers’ main perception of TL use is that it should be used as much as possible. However, they all occasionally include the use of L1 in order to aid comprehension and prevent students’ anxiety. All three teachers emphasized the importance of a safe learning environment, especially when learning a new language. Even though the teachers agreed that the knowledge criterias for the subject of English in primary school do not place high demands on the students’ abilities in English, they as teachers place higher demands. The reason being that Swedish students’ level of English is higher than ever before and in turn teachers’ expectations are higher.