While Gaian will learn and speak whatever human language(s) are native to their place of origin, Gaian have an alphabet of their own, called “Gaiash” (guy-ish). The Gaiash alphabet is made up of 26 symbols, each corresponding with a matching letter in the Latin alphabet. Gaiash is written completely in lowercase.
You can easily type in Gaiash with the "Gaian Script" font!