The purpose of this essay is to investigate how the holdings for the minority languages, in particular the Sami languages, appear in the public libraries. The essay also investigates competence and knowledge development at four public libraries that all work towards national minority groups and minority language. Public libraries have a great opportunity to be a place for meetings but also to highlight the minority languages and thereby attract reading. There are factors why libraries do not further develop their activities around issues related minority groups and languages. There is a lack of understanding of the minority languages. It can be difficult to understand the meaning of the Swedish library act and what the law means in concrete terms. The method for this essay is semi-structured interviews and a content analysis of the empirical material used. The interview materials where coded based on three themes: the first was about the librarian's own knowledge and perception. The second theme was about the librarian's opportunity for knowledge development and the third was about the libraries' holdings and how the Sami languages are represented. The material was then analyzed based on a theory of professions with concepts such as cultural competence, information competence and mediation competence. The results show that competence varies greatly between different librarians. Likewise, the holdings in the Sami minority languages seem to be different in libraries. The results also show that it is the librarians own personal interest as well as the organizations overall goals and strategic work that drives the process forward. The results also show that networking is a significant factor for competence development and cohesion between librarians who work with minority groups.