When the comprehend languages spell is cast, the wizard is able to understand the spoken words of a creature or read an otherwise incomprehensible written message (such as writing in another language). In either case, the wizard must touch the creature or the writing. Note that the ability to read does not necessarily impart understanding of the material, nor does the spell enable the caster to speak or write an unknown language. Magical writing cannot be read, other than to know it is magical, but the spell is often useful when deciphering treasure maps. This spell does not reveal messages concealed in otherwise normal text.
The reverse of this spell, confuse languages, cancels a comprehend languages spell or renders a writing or a creature's speech incomprehensible.
Note: This version of comprehend languages originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.