Actually his problem was to know whether his wife can procced at the POE without knowing english. That was his question.
My idea about this
1. If English is necessary (I know it is helpful if you speak english) , how do people who are not familiar with english pass at POE
2. See the following taken from the M-618.pdf (A guide for new immigrants issued by UCIS). According to that even you don't know english you can find a job and english speaking is not mandatory for that job , the emplyer can't refuse of giving the job.
What I wnat to show is knowing english is helpful , there is no argument , but not mandatory
Speaking English at Work
If you do not speak English, try to learn it as soon as
possible.You can find free or low-cost English language
classes in your community, often through the local public
schools or community college. Knowing English will help
you in your job, your community, and your daily life. See
page 60 for more information on learning English
If your employer says you must speak English at work, he
or she must show that speaking English is required for
you to do your job correctly. Your employer must also
tell you that English is required before you are hired.
If your employer cannot show that speaking English is
required for your job, he or she may be breaking a
federal law. If you need assistance or more information,
you can contact the U.S. Equal Employment Opportunity
Commission (EEOC). Call 1-800-669-4000 or 1-800-669-
6820 (hearing impaired) or go to
http://www.eeoc.gov.