Officially, Arabic is accepted by many states, if briefly, from Mauritania to Oman. I know about existence of classic Arabic (Who regulate, if regulated? I mean edition of the dictionaries, textbooks, etc. For example this role for Russian language play academic Institute of Russian Language, in Moscow). Of course I can read about it. But, using the fact that there are many Arabic-speaking users on RG, I want to ask your practical opinion: Are exist different (if exist) oral language options in different countries (or in different part of certain countries)? Can an Arabic-speaking person determine from which part of the Arab world his interlocutor is? Has any Arab country declared its dialect as a separate language?