I interacted a bit with the AI and the Portuguese is fine, it's just that it conjugates, uses the proper pronouns, etc. These things a typical Brazilian does not do.
The difference between standard Portuguese and oral language in Brazil is enormous.
This reminds me of a story from my Russian teacher. She was speaking with some American Russian-speakers who work for our three-letter agencies or something, and their Russian was perfect, amazing - but one thing gave them away: conjugating numbers too perfectly.
Native speakers are lazy: even though they know perfectly well how to conjugate the numbers, it’s easier to rephrase things so you don’t have to.
The difference between standard Portuguese and oral language in Brazil is enormous.