--[[  __ __ _ _ _ _ _ _ _   | \/ | ___ __| |_ _| | ___ _ / \ _ _| |_ ___ | |_ _ __ __ _ _ __ ___| | __ _| |_ ___   | |\/| |/ _ \ / _` | | | | |/ _ (_) / _ \| | | | __/ _ \| __| '__/ _` | '_ \/ __| |/ _` | __/ _ \  | | | | (_) | (_| | |_| | | __/_ / ___ \ |_| | || (_) | |_| | | (_| | | | \__ \ | (_| | || __/  |_| |_|\___/ \__,_|\__,_|_|\___(_)_/ \_\__,_|\__\___/ \__|_| \__,_|_| |_|___/_|\__,_|\__\___|    Authors and maintainers: * User:Zolo - original version * User:Jarekt  ]]  -- local function to help normalize input arguments local function normalize_input_args(input_args, output_args)  for name, value in pairs( input_args ) do  if value ~= '' then -- nuke empty strings  if type(name)=='string' then name=string.lower(name) end -- convert to lower case  output_args[name] = value  end  end  return output_args end  -- initialize object to be returned local p = {}  --[[ autotranslate   This function is the core part of the Autotranslate template.    Usage from a template: {{#invoke:autotranslate|autotranslate|base=|lang= }}   Parameters:  frame.args.base - base page name  frame.args.lang - desired language (often user's native language)   Error Handling:  ]] function p.autotranslate(frame)   -- switch to lowercase parameters to make them case independent  local args = {}  args = normalize_input_args(frame:getParent().args, args)  args = normalize_input_args(frame.args, args)   -- get language fallback list  if not args.lang or not mw.language.isSupportedLanguage(args.lang) then  args.lang = frame:callParserFunction( "int", "lang" ) -- get user's chosen language   end  local langList = mw.language.getFallbacksFor(args.lang)  table.insert(langList,1,args.lang)   -- find base page  local base = args.base  args.base = nil  assert(base and #base>0, 'Base page not provided for autotranslate' )  if not mw.ustring.find(base,':') then -- if base page does not indicate namespace  base = 'Template:' .. base -- than assume it is a template   end   -- find base template language subpage  local page = args.default -- default page if provided or nil otherwise  for _, language in ipairs(langList) do  if mw.title.new(base .. '/' .. language).exists then  page = base .. '/' .. language -- returns only the page  break  end  end  assert(page, string.format('No fallback page found for autotranslate (base=[[%s]], lang=%s)', base, args.lang))   -- Transclude {{page |....}} with template arguments the same as the ones passed to {{autotranslate}} template.  return frame:expandTemplate{ title = page, args = args} end  return p