Some signs of one of two versions of Luwian, a language used in Hittite and some other regions. Wikipedia: The two varieties of Proto-Luwian or Luwian (in the narrow sense of these names), are known after the scripts in which they were written: Cuneiform Luwian (CLuwian) and Hieroglyphic Luwian (HLuwian). There is no consensus as to whether these were a single language, or two closely related languages.