the croatian language uses a latin script of 30 letters and one diphthong "ie" or "ije", and "ŕ". this system is called "gajica" in croatian (or croatian gaj's latin alphabet). the name came from ljudevit gaj. the letter order (and whole alphabet) is called "abeceda" in croatian, because the first 4 letters are spelled "a, be, ce, de". for writing foreign names and words, and in some professions, the croatian language uses letters which do not belong to "gajica", like "x, x (iks), y,y (ipsilon)" and others.