This also exists for Arabic and other languages and has for maybe twenty years.

The first popular Arabic one was by a startup called Yamli. Google then launched a transliteration tool called Ta3reeb (I was working there at the time and helped build it during my 20% time). Microsoft then launched one called Maren.

They all let you type English letters then would try to deduce the Arabic words/script for it, and though the keyboard and mapping weren't exact, through some pretty primitive spell checks you could get 95% of the way there.