It is so important that we start with the presumption that the person is a learner! Learning takes time and sometimes a good amount of patience. Always presume they are on their way to developing competence in learning this new language.
My mom is Puerto Rican and was raised in a strict Catholic household. My father is from New Jersey and was raised in a Jewish household. My mom moved to the states when she was in her twenties, met my dad, got married, and then they had me.