Is the Arabic language uniform amongst the Arab world?
Whereas all Arabs use Modern Standard Arabic for the exchange of printed information, especially on formal occasions, there are dialects used mainly for oral communication, Arabic as a spoken language has been more flexible. Although all dialects may have descended from a single source (which is either Classical Arabic or another spoken variety of it), their development was not tied to the norms or rules of Classical Arabic. However, in spite of the differences between all Arabic dialects, their underlying structures are quite similar.