In the FAA system there is no official test for English proficiency. The regulations require ATC controllers to be able to "read, write and understand the English language and speak it without accent or impediment of speech that would interfere with two way radio conversation." The person conducting the examination of the controller for their certification would talk with the controller and determine they are able to speak and understand English. The reality is the instruction for FAA ATC personal is a 3 month training program. There are requirements that must be met to enroll in the training program, either college or work experience. If a person was not able to read, write, understand and speak English they would not be able to enter the training program.