Add transliteration/transcription as a feature to ETS. It should automatically transliterate/transcribe arabic characters to Latin and reverse.
The Arabic chat alphabet is highly used by young people (and not just them) in arabic countries, I definitely thing there is a use case for it.
This Wikipedia page explains a bit more:
https://en.wikipedia.org/wiki/Arabic_chat_alphabet
Any chat app could probably be a candidate for it.