@guilhermesilva My child did this too. I had her evaluated by a speech therapist, and she didn’t qualify for therapy but what the therapist suggested was repeating what she just said with the correct pronouns. So if she said “you want a snack” I would say “
I want a snack”, putting emphasis on the I.
My child loves reading so I got a bunch of books written with first person language. Clifford the Big Red Dog and Little Critter books were good for this.
I also realized I was using a lot of “you” language and cut it out as much as possible. I know some parenting experts recommend following your kid around all day and “sportscasting” everything they do, like “you did this, now you did that, you feel sad, blah blah” but if you think about it, that’s not how adults speak on a normal daily basis. I don’t follow my husband around saying “you’re making coffee, now you’re walking to your office!” Honestly I regret listening to that nonsense and wish I just talked to my kid like a normal person.
I agree with your husband though, I would not wait until it’s considered a problem to start working on correcting it. It took A LOT of correction to get my daughter to figure it out because she had already been speaking wrong for over a year. I wish I had corrected her from the beginning. Keep in mind that he is still learning language. The more that you respond to him as if he is using the correct pronouns, the more that it’s cemented in his brain as the right way of speaking. He is not going to become self conscious if you gently and matter of factly correct him. Would you have a problem correcting him if he called a cat a dog? Or would you simply say “that’s a cat.” It’s the same thing. It’s not shaming, it’s just teaching them the right way to say things.