Dokumentaci tohoto modulu lze vytvořit na stránce Modul:Yesno/Dokumentace

-- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.

-- kopie z německých wikicest (https://de.wikivoyage.org/w/index.php?title=Modul:Yesno&oldid=842185)
-- copy from dewikivoyage (https://de.wikivoyage.org/w/index.php?title=Modul:Yesno&oldid=842185)
return function (val, default)
	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
	-- following line.
	val = type(val) == 'string' and val:lower() or val
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 'wahr'
		or val == 'ja'
		or val == 'j'
		or val == 'ano'
		or val == 'a'
		or tonumber(val) == 1
	then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'falsch'
		or val == 'nein'
		or val == 'ne'
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end