UNESCO provide a classification system to show just how 'in trouble' the language is:
- Vulnerable - most children speak the language, but it may be restricted to certain domains (e.g., home)
- Definitely endangered - children no longer learn the language as a 'mother tongue' in the home
- Severely endangered - language is spoken by grandparents and older generations; while the parent generation may understand it, they do not speak it to children or among themselves
- Critically endangered - the youngest speakers are grandparents and older, and they speak the language partially and infrequently
- Extinct - there are no speakers left
Languages and Literatures of Eastern Christianity by 
Linguistic Variety of Judaeo-Arabic in Letters from the Cairo Genizah by 
