Mamale , just a side note
The the “x” is xmas is not a jewish invention , It comes from the greek letter chi which looks like the letter X and it means our lord and savior so xmas is just as bad as any other way of saying it, The only real neutral way to say it is December 25th.
I dont know if the Williamsburg kids are frum only and I do know they dont teach them in Yiddish because the kid whom I know was sent there does not speak yiddish (She barely speaks and when she does its english) and her parents I dont think speak yiddish either (If they do they dont do it in public and dont have any yiddish accent and their other kids also speak with a typical NY accent)