Jéchangeais
J'échangeais is a French term that functions as the imperfect indicative first-person singular of the verb échanger. The verb échanger generally means to exchange, swap, trade, or reciprocate. Therefore, "j'échangeais" translates to "I was exchanging," "I used to exchange," or "I would exchange."
This grammatical form is used to describe an action that was ongoing or habitual in the past.
The context in which "j'échangeais" appears will determine the precise nuance of the translation, but the core