def map_language(self):
        "handle language (no hyphen mapping)"
        arg0 = self.arg0  # no hyphen mapping
        if arg0 and self.languages and arg0 in self.languages:
            self.language = arg0
        else:
            self.language = self.default_language
        if self.language:
            log_rewrite(self.language % "route: language=%s")
            self.pop_arg_if(self.language == arg0)
            arg0 = self.arg0
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/rewrite.py/MapUrlIn.map_language/swapped operands of `%`