It is essential for second/foreign/additional language teachers to develop their digital competence in digital environments. This article explores language teacher development in digital technology integration in terms of exploration, communication, collaboration, and reflection (ECCR). It presents the results of a study that investigated how language teachers explore, communicate, collaborate, and reflect for technology-enhanced language teaching (TELT), how they approach ECCR, how much they engage with ECCR activities, and what support they need to improve their competence in TELT. Data were collected from an online questionnaire and semi-structured interviews with groups of in-service language teachers in Hong Kong and Taiwan. Findings indicate that the teachers in both countries are engaged with various ECCR activities with different interests and competencies in their contexts. They enhance our understanding of language teacher development and provide implications for professional development with ECCR.