Spanish is her mother tongue, but she has no education in it, and she is fairly clumsy in it sometimes. Its certainly good enough to travel and live in Spain I’d say, but not to be a TV talking head. She needs conversation classes.
This is a Telemundo interview where she says as much. Apparently the first time she was interviewed in Spanish.
https://m.youtube.com/watch?v=WKh_3sVsSJY
You will find a very few other cases of her speaking Spanish.
She speaks barmaid Spanish.