I'd say it's really up to you at this point. In your own head do you think of yourself as a French person or Chilean or Brazilian? What does your internal monologue sound like to you? Which of these cultures do you mostly identify with? Which history do you feel is your own?
At the end of the day is a specific label something you actually want, or is it something you think you need to show to other people?
Maybe I'm missing some context here but I would probably just say "Russian" or "French" 🤷♂️