I always do an introduction at the start and a 'thank-you for flying BA' at the end, in Arabic on our Middle Eastern routes.

The farewell includes;

El Gaweiya/Jaweiya (depending on CAI or AUH/KWI flights), El/il Britann-ia

It sounds like that's what you have been hearing as the CAI crew helped me out with my Arabic and I have since double checked, and it is correct.

Kind regards

BA.MF.CSM