Wikipedia
IsiNgqumo
IsiNgqumo, or IsiGqumo, (literally "decisions" in the language itself) is an argot used by homosexuals of South Africa and Zimbabwe who speak Bantu languages, as opposed to Gayle, a language used by the homosexuals of South Africa who speak Germanic languages. IsiNgqumo developed during the 1980s. Unlike Gayle isiNgqumo has not been thoroughly researched or documented, so figures on numbers of speakers are nonexistent.
IsiNgqumo is a Nguni language and seems to have derived from Zulu. IsiNgqumo is often considered a Western invention by indigenous Zimbabweans but it was actually a creation of indigenous homosexuals, an only recently self-aware group.