Module:LangSwitch explained

--\/ | ___ __| |_ _| | ___ _| | __ _ _ __ __ _/ ___|_ _(_) |_ ___| |__ | |\/| |/ _ \ / _` | | | | |/ _ (_) | / _` | '_ \ / _` \___ \ \ /\ / / | __/ __| '_ \ | | | | (_) | (_| | |_| | | __/_| |__| (_| | | | | (_| |___) \ V V /| | || (__| | | | |_| |_|\___/ \__,_|\__,_|_|\___(_)_____\__,_|_| |_|\__, |____/ \_/\_/ |_|\__\___|_| |_| |___/ Authors and maintainers:

• User:Zolo - original version in Module:Fallback
• User:Jarekt

local p =

--local function defaultCheck(args) if not args.en and not args.default then local err = 'LangSwitch Error: no default' if args.nocat

'1' then return err else return err .. '' end end return falseend

local function quickSwitch(args, arg) local err = defaultCheck(args) if err then return err end if arg

'~' then arg = end return argend

function p._langSwitch(args, lang) -- args: table of translations -- Return error if there is not default and no english version local err = defaultCheck(args) if err then return err end -- get the list of accepetable language (lang + those in lang's fallback chain) and check their content assert(lang, 'LangSwitch Error: no lang')

--local langList = --if not args[lang] then local langList = mw.language.getFallbacksFor(lang) table.insert(langList, 1, lang) table.insert(langList, math.max(#langList, 2), 'default') --end

for _, language in ipairs(langList) do lang = args[language] if lang

'~' then return elseif lang and lang ~= then return lang end endend

--langSwitch|en=text in english|pl=tekst po polsku|lang= }} Parameters: frame.args - table with translations by language frame.args.lang - desired language (often user's native language) Error Handling:function p.langSwitch(frame) -- version to be used from wikitext local args = frame.args -- if no expected args provided than check parent template/module args if args.en

nil and args.default

nil and args.nocat

nil then args = mw.getCurrentFrame:getParent.args end

local lang = args.lang if not lang or not mw.language.isSupportedLanguage(lang) then lang = frame:callParserFunction("int", "lang") -- get user's chosen language end

-- Try quick switch local args1 = args[lang] if args1 and args1 ~= then return quickSwitch(args, args1) end

-- Allow input in format: -- with multiple languages mapping to a single value args1 = for name, value in pairs(args) do if value ~= and type(name)

'string' then -- split multi keys for str in string.gmatch(name, "([^/]+)") do args1[str] = value end end end return p._langSwitch(args1, lang)end

return p