I travel a lot there and I have relatives there, but that doesn't matter for this case, because the rules in the OSM Wiki are clearly that Arabic is used primarily for the name tag:
https://wiki.openstreetmap.org/wiki/United_Arab_Emirates#Naming 

Hundreds of thousands of street names have Arabic in the "name" tag and English in the "name:en" tag. There is a reason for this and it would be absurd to change it.

If you want to change or discuss this rule, please use the OSM mailing lists, forums or Wiki discussions:
https://lists.openstreetmap.org/listinfo/talk-asia

Of course English is a lot spoken in the big cities, but the official and native language is Arabic, especially in rural and mountainous regions.

For "The National Atlas of the United Arab Emirates" also an equal Arabic language edition exists. Do you even have a permission/licence to use this work for OSM?

You can use of course the Latin/English name in the primary "name" tag, if there is no Arabic equivalent available. But if there is already an Arabic name in the primary name tag, it should not be changed. 

Kumzari is also written with Arabic alphabet and place names in Kumzari are identical or nearly-identical to their Arabic equivalent, so this is more an argument in favour of using Arabic as primary name.