Here are all known wikibooks projects in various languages:
العربية, Anglo Saxon, Български, Català, Česky, Чăвашла, Cymraeg, Dansk, Deutsch, Ελληνικά, English, Esperanto, Español, Eesti, ??, Suomi, Français, Galego, עברית, Magyar, Interlingua, Bahasa Indonesia, Interlingue, Íslenska, Italiano, 日本語, 한국어, Kurdî / كوردي, Latina, Lietuvių, Македонски, Ekakairũ Naoero, Nederlands, Norsk (bokmål), Polski, Português, Română, Русский, Simple English, Slovenčina, Slovenščina, Shqip, Српски / Srpski, Basa Sunda, Svenska, தமிழ், ไทย, Türkçe, Tatarça, Українська, Tiếng Việt, 中文
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