Lilitika is a predominantly agglutinative language developed by the Lilitai, the surviving human slaves of the Ksreskézai, after their exodus. Most of its grammar and lexicon are drawn either from altered Ksreskézaian forms, novel innovation by its native speakers (especially poets), or deliberate language planning. Owing especially to the long lives of its speakers, its phonology is extremely conservative, undergoing very few vowel shifts and only slight modest simplification over the thousand years of its most productive period.

The language's development is divided into eight major periods, often called chronolects or dialects, and named after the official standards documents that describe them. Each period incorporates a distinct set of inflectional rules (except for the Venrafivía, or "slang" period, where no standard prevailed and many systems proliferated) but generally retains similar syntax, word combination patterns, and vocabulary usage.

On Thet and in more recent years, Lilitika is known primarily not as a method of everyday communication, but rather as an artistic instrument to be wielded in lyrics and epigrams. Its primary legacy is the similarly-named Lilitic, or Modern Lilitic, which is a Glissia-based mixed language of predominantly Indo-European character. Nevertheless, Archaic Lilitika (c. 67890–950 LKY, containing the Íomanazinení, Zeyetaní and early Venrafivíai forms) and Classical Lilitika (c. 67960–8150 LKY, containing Late Venrafivíai, Sarasí, Illeran, Ketalán, and Dísséan) were the native languages of a tightly-focused artistic community of immense productivity, and efforts are still ongoing, countless centuries later, to preserve and catalogue much of their output.