Orc Languages
Listed below is a collection of works from various authors, detailing their own fictional accounts of the language spoken by orcs.
         Orkish and the Black Speech

An impressive analysis of Tolkien's 'Black Speech'. Orc words and the translations provided at the end of the article.
         Orc Language of Tolkien

This work provides many orc words as spoken by Tolkien's orcs, and basic gramatical rules.