Practical driving exam

It sounds like the problem is with the examiner rather than the instructor, so changing schools would not change the situation. He could explain the problem to his instructor (using an interpreter if needed) and see if he/she could have a word with the tester, but if the examiner is unsympathetic to non-Spanish speakers (and this can of course happen)...

I am a bit surprised that your husband does not speak Spanish, as even 30 years ago we found Chicago had lots of signage in both Spanish and the American version of English, even down to the "mind the doors" signs on the El" and of course Florida probably has as many Hispanic folk as any other group.