Would a national language be unifying / disunifying?

[oldhippie]

59. It is still a requirement

When my wife took her citizenship exam (she is Taiwanese) in 1980, she was required to pass a civics test in English that would stump most current US students. She also had a 10 minute interview with an examiner where they discussed various issues in English.

The requirements today seem to be similar.

"The ability to read, write and speak ordinary English unless they are physically unable to do so due to a disability such as being blind or deaf, or suffer from a developmental disability or mental impairment. Those over 50 years old on the date of filing who have lived here for a total of at least 20 years after admission as a permanent resident and those who are over 55 and have been legal permanent residents for at least 15 years are also exempt from this requirement.

A basic understanding of the fundamentals of US history and government. There is an oral test that covers fundamentals of US history and government and it is required for naturalization."

From http://immigration-law.freeadvice.com/immigration-law/citizenship/naturalization_requirements.htm