Immigration (/ɪmɪgreɪʃən/) is moving into another country permanently.
Migrants into English-speaking countries often need to improve their English levels, or at least demonstrate linguistic competence in an exam. They also may have to pass a citizenship exam, for which they might need teaching.
Conversely, it is possible to use teaching English as a career to migrate away from an English-speaking country and into another country. For example, a British teacher might move to and settle in France, and eventually acquire French citizenship.
We have some immigration conversation questions.