Presumably with what's called a "reasonable accomodation". For example, interviewers always facing the candidate to facilitate lip-reading and allowing use of a speech synthesizer. Perhaps even paying for a sign-language interpreter (although, for eventual employment, that may well not be reasonable).
These are, of course, just examples from a complete non-expert, and there is a plethora of information on the Internet regarding accomodations, as well as what's considered reasonable (and how that's arrived at for each situation).
Even if a heavy-enough accent could be accomodated in a similar manner (which is debatable, at least), it's questionable if it's a disability under the law (philosophically/morally is yet another matter).
These are, of course, just examples from a complete non-expert, and there is a plethora of information on the Internet regarding accomodations, as well as what's considered reasonable (and how that's arrived at for each situation).
Even if a heavy-enough accent could be accomodated in a similar manner (which is debatable, at least), it's questionable if it's a disability under the law (philosophically/morally is yet another matter).