paralegal for non native English speaker

Hi, I am thinking of taking a paralegal course in order to get a certification. I want to work as a paralegal. I am Japanese, have a bachelor degree in English literature and nine years' experience as an executive assistant in my country. My question is whether it is possible for a non native English speaker to be a paralegal. I am fluent in English and have no problem living in US, but I still need to learn more vocanulary to reach to a native level. Since my area does not have many Japanese companies I can not appeal myself as a bilingual when I look for a job. Do you think it is disadvantage not to be a native speaker to find a job? I also want to know if any law firm supports visa for foreign paralegal. Thank you.

Thanks for your comment. I agree that we need a excellent language skill to be a paralegal. I am ready to work harder to compensate for my disadvantages.