To add to what that other person said, when you grow up your brain gets used to hearing the sounds common to your accent and you can even stop hearing the difference between certain sounds when someone speaks your language with a different accent!
In Quebec french there’s a big difference between the sound of “pré” and “prè” that doesn’t exist with some of the french accents in France and they’re unable to recreate that difference and might even be unable to hear it!