The closest relative to Warlpiri is Warlmanpa. It has four main dialects, (1)Yuendumu Warlpiri, in the south-west; (2)Willowra Walpiri, in the central area, around the Lander River; (3)the northern dialect, Lajamanu Warlpiri; and (4) the eastern dialect of Wakirti Warlpiri, spoken on the Hanson River. Most Warlpiri-speakers are bilingual or multilingual, English being their second, or perhaps third, fourth or fifth language. The younger generation of Warlpiris at Lajamanu have developed a new language, light Warlpiri, based on an amalgamation of words and syntax from Warlpiri, English and Kriol. Many also speak other languages, such as Arrernte, Jaru, Western Desert Language, Warumungu. Indigenous sign language is also an important component of Warlpiri communication, as many of 600 distinct signs being used.