Your character knows the rudiments of the Atlantean High Speech. He can utilize it in spellcasting for a burst of power (see “Words of Power,” p. 117), as well as to extend a spell’s Duration using runes (see “Atlantean Runes,” p. 119).
If your mage begins play as a member of an order, he learns this Merit at no cost. If he is not a member of an order, he must purchase this Merit using his initial Merit dots or with experience points (assuming there is someone who can teach it to him).
High Speech can be spoken and comprehended only by the Awakened. Sleepers’ minds cannot process it. They might hear an Atlantean phrase as a series of nonsense words, or even silence (the speaker’s mouth moves but no sound comes out). Particularly willful Sleepers might catch bits of it, but even then it might sound like a tape played too slow with the bass turned way up.