For the record, as of January 2014, 28 of the 50 states had designated English as the official language. Hawaii also includes Hawaiian as an 'official' language. I am not suggesting that radio stations shouldn't be permitted to provide programming for aliens and tourists visiting our nation who either cannot speak English or who would prefer to be entertained in a language other than English. However, that doesn't mean that the official, legal requirement for every station that uses the public's airwaves to identify itself in English, if only to remind foreigners who are living or visiting here that they are here in the United States, where English is one of the common threads of culture that binds us all together as a nation.
I made a conscious effort to learn to speak French, and am reasonably competent at communicating with other French speakers. All knowledge is good, including knowing a second language (or a third, fourth, or fifth!). However, even though I learned to speak French, I have not changed my last name to something French sounding for professional purposes. Not that there's anything wrong with doing that.
The only thing I oppose is to single out any one group of foreigners for special consideration just because there are large numbers of them. I do not think it to be any sort of bigotry or oppression to require that all radio stations broadcasting on American airwaves identify themselves every half-hour in English.
Does anyone know if Mexican radio stations are required to identify themselves periodically, and if so, are they permitted to do so in English?