I like this. It vibes with a language learning app concept idea I recently shared out loud.
When I have a conversation with someone in a language that I'm learning (was Russian and Greek, now Arabic) I record the conversation. I then get both native-speaker audio to add to Anki for the things they said, plus I get a list of words that I either needed to use or that the other person used, to add to Anki.
A secondary benefit is that this system encourages me to go out and seek interactions with people, a clear benefit for a natural introvert.