I would say the opposite; talk to your child only in your native language. Kids will learn English by themselves in school anyway, and if they don't learn your language from you, they for sure won't learn it elsewhere.
Source: as a kid I was in that situation, at first my parent spoke only in English with me and I started to forget Portuguese. After my parents realized that they pivoted to speaking Portuguese. I learned English fine at school and never had problems with either languages. Now I'm a parent of a 2yo and 1yo and am speaking Portuguese with both.
> Kids will learn English by themselves in school anyway
If you live in an English speaking country then sure. Over here it’s almost impossible to learn English in school, you only get a few hours per week of English classes.
It depends on the kid and on the type of “immersion” (for lack of a better word). I grew up in Romania in the ‘90s, when we had 2 hours of English per week starting with the 5th grade. I turned up fine when it comes to speaking/writing/reading the language, of course that I’ll always carry an accent when speaking it but I don’t care.
Looking back at it, after 3 decades, what helped me learn the language was that immersion I mentioned, i.e. I was watching English TV programs (Cartoon Network, Eurosport, MTV Europe) for a big part of the day, without that I wouldn’t have been able to pick it up so easily.
My experience is that it’s very easy to expose kids to English in a non-English country - just let them consume all their entertainment (Netflix, games, books) in English right from the start. You don’t need to do anything special other than that.
Source: as a kid I was in that situation, at first my parent spoke only in English with me and I started to forget Portuguese. After my parents realized that they pivoted to speaking Portuguese. I learned English fine at school and never had problems with either languages. Now I'm a parent of a 2yo and 1yo and am speaking Portuguese with both.