Let's say one person is the child of French parents, another is a child of German parents, both first generation born in New York, live they life in New-York, s

Let's say one person is the child of French parents, another is a child of German parents, both first generation born in New York, live they life in New-York, study in the same school and hang out at the same parties. Maybe they even will learn to speak French and German from their parents, to talk with their grandmas, but let me blow your mind: they will speak exactly the same English with exactly the same accent. And it's very unlikely that real French and Germans will mistake them for being native French and Germans, except if they really speak French/German a lot. Of course it will be the same in Israel. Even though you might have to make some discount to more fragmented community. (Which really isn't that special with Israel either: you know that some small European countries have up to 4 official languages, right? Rest assured, not all the people in these countries speak all 3 or 4 of these languages equally well.)