The ruling on a non-Arab who is proficient in the Arabic language speaking with his family in another language

Question : Is it permissible for him to speak in a foreign language between himself and his family, whether inside or outside the house? And what is the ruling for the elderly who are proficient in Arabic but speak it with difficulty?

Answer : Yes. And there is no doubt that if Allah bestows upon a person the blessing of learning Arabic, he should not deny this blessing and return to babbling. However, his speech with his family in his home in a foreign language may be easier, easier and closer to understanding. If he notices this, there is no harm.