Help:Type Boolean/Localized formatter

As mentioned before you may enter "true" or "false", also 1/0, yes/no, t/f, and y/n as possible values for booleans depending the content language. To find out about (and possibly change) the booleans used in your language, see the messages MediaWiki:Smw_true_words and MediaWiki:Smw_false_words.

See the effect for this wiki at: Help:Examples for Boolean Options

Localization based on user language is provided with the  output formatting option. Furthermore, if a page has set a specific page content language CiteRef::sb:smw:1580 then the DV tries to match local values against that language CiteRef::gh:smw:1580 instead of the global content language.