Throughout the world, schools are visited by students with different native languages. Therefore, the linguistic competencies of the students are diverse. Dealing with this diversity is a great challenge for teachers in general, including in science subjects. To face this challenge, all institutions involved in education should adapt their teaching and learning to linguistic diversity to foster student's language competencies. Non-formal education, such as student laboratories, could enhance formal chemistry education and support students in learning the subject's contents and acquiring language competencies. To this purpose, language-sensitive and language-supportive learning settings for different chemical topics and contexts are developed to enable all students to participate actively and foster language competencies. The learning settings are implemented and evaluated at the Ludwigsburg University of Education (Germany) using a cyclical approach based on Participatory Action Research. Data from 147 students from seven learning groups of various grade levels and school types were collected before and after they experienced the work in student laboratories. The focus was on students' situational interests and their views on offered language-sensitive and language-supportive methods, tools, and activities. The data shows that the approach has a positive effect on students' situational interest. Methods that were especially helpful for the students are filtered. On this basis, implications are drawn for the application to other non-formal education offers