Learning English is a potentially profitable investment for immigrants in the U.S.: while there are initial costs, the subsequent benefits include the ability to communicate with the majority of the population, potentially leading to better paying jobs and economic success in the new country....

Germany and Canada stand at polar ends of the scientific debate over language integration and ascension to citizenship. German naturalization, as of January 2000, contains an explicit language criterion for naturalization. The first German immigration act that will presumably come into effect on...