local i = {}   function i.IsLatin(frame)     local txt = frame.args[1];     if txt == '' then         return '';     end       local len = mw.ustring.len(txt);     local pos = 1;     while ( pos <= len ) do         charval = mw.ustring.codepoint(mw.ustring.sub(txt, pos))         -- note 8364 is the € symbol         if charval>687 and charval~=8364 then             return "no";         end          pos = pos + 1;     end     return "yes"; end   return i;