Use AI as a language teacher

I’m learning European Portuguese, and I’ve asked AI to be my tutor. I use a prompt like this:

Have a simple conversation with me in European Portuguese in the Simple Present tense and correct me in English when I get anything wrong. Start by asking me about my day. If I respond with "t" repeat what you said in English.

I use Claude Sonnet 3.5, but it doesn’t seem to matter what AI you use. — MF