Federal Motor Carrier Safety Administration regulations state that, in order to qualify for a commercial drivers' license, a person must be able to read and speak English well enough to take the written exam and communicate with the examiner. The written tests are not available in other languages.
In addition, the FMCSA stipulates that CDL drivers must fill out all mandated reports in English. Drivers must also be able to understand road signs written in English. The FMCSA further indicates that a driver's English language skills should be sufficient to communicate with the general public and with law enforcement officials. Under U.S. Department of Transportation regulations, proof of citizenship is also required to apply for a CDL.