|Native to||Papua New Guinea|
Unserdeutsch ("Our German"), or Rabaul Creole German, is a German-based creole language that originated in Papua New Guinea. It was formed among the New Guinean children residing in a German-run orphanage in what was then German New Guinea. Oral stories tell a version that Unserdeursch originated by children sharing stories where they used German vocabulary with Tok Pisin grammar, this change in language is referred to as Relexification.  About 100 native speakers survive today, most of whom migrated to Australia after Papua New Guinea's independence in 1975.
Most speakers of Unserdeutsch are bilingual; speaking either Standard German, English, Tok Pisin or Kuanua. Most speakers are middle-aged or older, although younger members of the community may comprehend the language. The descendant of a pidginised form of Standard German which originated in the Gazelle Peninsula of New Britain during German colonial times among the Catholic mixed-race (Vunapope) community. With increased mobility and intermarriage, it has been disappearing in the last few decades.
Unserdeutsch presumably influenced the development of its neighbour, Tok Pisin. Unlike Namibian Black German in Namibia, it is a creole; indeed, it is the only creole that developed from colonial German.
- Unserdeutsch, Special Broadcasting Service, 16 March 2016
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Unserdeutsch". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
- Maitz, Peter; Volker, Craig Alan (4 December 2017). "Documenting Unserdeutsch Reversing colonial amnesia" (PDF). Journal of Pidgin and Creole Languages. 32 (2): 376. doi:10.1075/jpcl.32.2.06mai.
- John Holm, 1989, Pidgins and Creoles, vol. 2: Reference Survey
- Peter Mühlhäusler: Tracing the roots of pidgin German. In: Language and Communication, 4/(1)/1984, S. 27–57. ISSN 0271-5309
- Craig A. Volker: Rabaul Creole German Syntax. In: Working Papers in Linguistics, University of Hawaii 21/1989, S. 153–189 (online)
- Craig A. Volker: An Introduction to Rabaul Creole German (Unserdeutsch). unpublished Master thesis (1982), University of Queensland. (online)
- Craig A. Volker: The rise and decline of Rabaul Creole German, Language and Linguistics in Melanesia. In: John Lynch (ed.): Oceanic studies : proceedings of the first international conference on oceanic linguistics Australian Nat. Univ., Canberra 1996, ISBN 0-85883-440-5 (older edition available here)