Linguist List: Double-Dutch and Youthese / Pig Latin  
   Mailing list posting talks about early occurrences of Pig Latin and other phonologically manipulated youth languages.
   http://www.linguistlist.org/issues/8/8-1221.html

University of Pennsylvania: Linguistic Form in Ritual and Play  
   Part of the schedule of lectures and assignments of Linguistics 001. Covers language games, song and verse. Includes a section on Ubbi Dubbi and children's language games in a number of countries.
   http://www.ldc.upenn.edu/myl/ling001/games.htm

Linguist List: Pig Latin  
   Mailing list posting mentions several play languages from different cultures, including Ubby Dubby and one used by natives of central Australia.
   http://www.linguistlist.org/issues/2/2-406.html

Vietnamese vs English: Noi Lai Play Language  
   Mailing list thread touches on the noi lai jargon and its significance in Vietnamese society.
   http://www.saigon.com/~kyanh/archives/vn-gblf/msg00303.html

Interactive Programming In Java: A Community of Interacting Entities  
   Word game examples of Java programming. Includes Pig Latin and Ubby Dubby.
   http://www.cs101.org/ipij/interlude-stringXformers.html

A Bibliography of References Pertaining to Prokem  
   An annotated bibliography of references pertaining to Prokem, a slang spoken in Jakarta, Indonesia.
   http://thslone.tripod.com/prokem.html

Verlan - French Slang à l'Envers  
   A summary of the French-based Verlan with examples.
   http://french.about.com/library/vocab/bl-verlan.htm

Prokem Slang  
   Short list of Prokem (Jakartan slang) terms with Indonesian and English glosses.
   http://www.angelfire.com/ga/gwali/slang.html

Parlez-Vous Verlan?  
   A brief discussion of Verlan.
   http://www.globalpolicy.org/globaliz/cultural/2002/0326verlan.htm

Verlan  
   A description of a French-based language game with examples.
   http://www.wikipedia.org/wiki/Verlan

Argot and Verlan  
   A detailed academic description of Verlan by Yvette Ellis, including information on syntax.
   http://www.well.ac.uk/cfol/argot.asp

Noi Lai - Vietnamese Play on Words  
   Three examples of Noi Lai phrases with their contexts are given.
   http://www.users.bigpond.com/doanviettrung/noilai.html

Same-Edge Alignment with Opposite-Edge Effects  
   A linguistic paper on ludlings, with examples in Baliktád (from Tagalog) and Zuuja-go (from Japanese).
   http://ling.ucsc.edu/~sanders/Papers/sanders-wccfl19.pdf

Intra-Representational Correspondence and the Realization of Empty Morphemes  
   A linguistic paper on ludlings.
   http://ling.ucsc.edu/~sanders/Papers/sanders-pqp.pdf

Ludlings  
   A bulletin board discussion of ludlings.
   http://pub122.ezboard.com/fwordoriginsorgfrm2.showMessage?topicID=298.topic

Language Game  
   Describes the term language game and gives examples from different languages.
   http://www.wikipedia.org/wiki/Language_game

Louchebem  
   A description of the French-based language game, Louchébem (or Loucherbem), with examples.
   http://www.wikipedia.org/wiki/Louchebem

Geringoso  
   A description of a Spanish-based language game used in Argentina, with examples.
   http://www.wikipedia.org/wiki/Geringoso

Linguist List: Language Games  
   Mailing list posting author Trey Jones presents a summary of secret and play languages from many cultures, including Cazarny Talk, the Russian Fufa Language, Arabic language play and Bengali Pig Latins. Extensive bibliography.
   http://linguistlist.org/issues/5/5-812.html

Cockney Rhyming Slang  
   An encyclopedia article on Cockney Rhyming Slang, with examples.
   http://en.wikipedia.org/wiki/Cockney_rhyming_slang

Vesre  
   Description with examples of a language reversal in Argentinian Spanish.
   http://en.wikipedia.org/wiki/Vesre