I don’t know about Jews elsewhere, but it seems to me that in the US most Jews speak English but use Hebrew names like HaShem to refer to God. It seems to me like Arabic-speaking Jews would also use Hebrew names for God. And, so what if Elohim and Allah have the same semitic roots? Elohim is the plural of El, God almighty. Like so many Freepers have already said in this forum, Allah is another name for Satan!
mmm...
In many contexts, the English word ‘God’ is used. ‘Hashem’ is used also, to avoid the problems being described, and to signify a Jewish reference. Unless one is reading a Holy or educational text, I can’t think of a use of ‘El’ or its cognates in English.
I believe ‘Allah’ is used where common English uses ‘God’, and where modern Hebrew would use ‘Elohim’. There might be good reason an Arabic speaker might want to avoid advertising a Jewish reference point.