Holmes's D&D Excerpt: alignment languages

"Lawful good, lawful evil, chaotic good, chaotic evil, and neutrality also have common languages spoken by each respectively. One can attempt to communicate through the common tongue, language particular to a creature class, or one of the divisional languages (lawful good, etc.). While not understanding the language, creatures who speak a divisional tongue will recognize a hostile one and attack."

-The five alignments in Dr. Holmes's D&D have their own languages, giving the PCs a possible avenue for communicating with monster's who don't speak the common tongue. (Page 9)