Vorlage:Multilingual switch
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A simple utility template to output various languages depending on the user-selected language. It uses the {{int:allmessages-language}} parser function for this ({{CONTENTLANGUAGE}} isn't changed according to user’s settings but is a wiki-wide setting, defined in Localsettings.php and variable $wgLanguageCode.) Presently defined only for English, French and German, but easily extendable. English is default.
USAGE: {{Multilingual switch|de=Deutscher Text|en=English text|fr=c'est ça}}