From the perspective that a teacher’s TPACK depends on the subject domain, the students and the ecology of the school and the classroom, this symposium intends to contribute to a better understanding of TPACK in language teaching. We present four studies that discuss the meaning of TPACK as a knowledge base for teaching language with technology (mother tongue and modern foreign languages). Two contributions studied what the knowledge base for teaching with technology could be in respectively early literacy and modern foreign language teaching. Two contributions demonstrate how TPACK in language teaching can be developed in in-service and pre-service teachers.