I'd like to suggest "Gudjal" as an alternative name for Warungu. I found this language spelled as "Gudjal" while doing research and wanted to find its ISO 639-3 code; I was surprised to be unable to use Ethnologue to find it, since the Ethnologue search does not include the term "Gudjal". You have "Gudjala" included already, but not "Gudjal". A few sources that include "Gudjal" as a primary name, alternative name and/or dialect name: Dixon, Robert M. W. Australian Languages: Their Nature and Development. Cambridge University Press, 2002. Holmer, N. Notes on Some Queensland Languages. Canberra: Australian National University, 1988. Santos, William. Gudjal Language Pocket Dictionary. Collingwood, Victoria: Black Ink Press, 2006. Santos, William. My Country in Gudjal Language. Collingwood, Victoria: Black Ink Press, 2006. (+ various other books by this author) http://www1.aiatsis.gov.au/language/language.asphttp://www.endangeredlanguages.com/lang/wrg Some of these sources classify Gudjal/Gudjala as a dialect of Warungu or as a separate language closely related to Warungu; nevertheless, these sources seem to agree that the name "Gudjal" is a variant of the name "Gudjala" which you already have listed in the entry for Warungu [wrg]. So, without getting into the question of classification as a language or dialect, my suggestion is simply to add the name "Gudjal" alongside "Gudjala" to make it easier to find when searching.
We will add "Gudjal" as an alternate name for Warungu [wrg] in Australia for the 19th edition.