Would an intelligence test be a valid test for measuring a person's knowledge of a foreign language?

Until 1987, in cases of extradition, a. all fugitives were protected from extradition by their political beliefsb. all fugitives were protected from extradition by their racec. the federal government could not force a state governor to return a fugitived. the federal government had the power to force a state governor to return a fugitive