Native speaker
In Emirati Arabic, “Where's the toilet?” is وين دورات الماي؟ (wayn dawraat il-maay?).
وين دورات الماي؟
Where's the toilet?
It's in the phrasebook under At a restaurant, with 11 more like it.
Source: DLIFLC Emirati Basic Language Survival Kit (2007). Credits and licences