The root of ARaBy (Arabic) is ARB, and also means "excellent" or "perfect" (See 56:37). Since the message of the Quran was sent to all humanity and jinns, the eloquence of the language of the Arabic Quran does not necessarily come from its being in the Arabic language, but its Arabic being ARB, that is, excellent or perfect. In other words, the message of this verse is not about the proper name Arabic, but about its literary meaning.
