Hittite was spoken north-central Anatolia (part of modern Turkey) and is generally classified as belonging to the Anatolian branch of Indo-European languages. Written records of Hittite date from between the 16th and 13th centuries BC, and it is the earliest Indo-European to appear in writing.
Hittite was written with a cuneiform script adapted from a version of Akkadian cuneiform from northern Syria and was deciphered during the early 20th century mainly by Bedřich Hrozný, with contributions by Jørgen Alexander Knudtzon, and Hugo Winckler, who discovered many tablets written in Hittite at the village of Boğazköy in Turkey.
Source: http://historicconnections.webs.com/biblicalarchaeology.htm
Information about the Hittite language and writing system:
http://www.utexas.edu/cola/centers/lrc/eieol/hitol-0-X.html
http://en.wikipedia.org/wiki/Hittite_language
http://www.ancientscripts.com/hittite.html
Hittte grammar
http://www.premiumwanadoo.com/cuneiform.languages/index_en.php?page=accueil
Hittite dictionary
http://www.wordgumbo.com/ie/cmp/hitt.htm
Carian, Hittite, Lycian, Lydian
Akkadian, Elamite, Hittite Old Persian Cuneiform, Sumerian, Ugaritic