[ʢ] (wikipedia) somewhat sounds like an R to my ears. You will certainly be understood, especially if the R is the only phoneme with a specific pronunciation of yours. As Pas un clue commented, [ʕ] (wikipedia) is slightly worse but still good enough as a substitute.
The letter R is likely the one with the widest range of realizations in French (including no phoneme at all). It has significantly evolved with time and there are still some regional variants too.
If you can manage (though that seems unlikely to me if the uvular fricative gives you that much trouble) an alveolar thrill, it would also be recognized as a "r"-sound. Rhotic consonants are fairly plastic.
Leave a comment