"Arabic poses particular challenges to Facebook’s automated systems and human moderators, each of which struggles to understand spoken dialects unique to each country and region, their vocabularies salted with different historical influences and cultural contexts.
"The Moroccan colloquial Arabic, for instance, includes French and Berber words, and is spoken with short vowels. Egyptian Arabic, on the other hand, includes some Turkish from the Ottoman conquest. Other dialects are closer to the “official” version found in the Quran. In some cases, these dialects are not mutually comprehensible, and there is no standard way of transcribing colloquial Arabic."