I wouldn't expect them to want to though. Not because it's a terrible language to program in, just because it's not going to look as good on a resume for later jobs.
And that’s the sad part of HR departments hiring by checklist, we develop a monoculture which makes it harder to actually see different ways of solving problems or creates a reinventing the wheel syndrome. There are professions that value people with a range of experience. It is really too bad that software development often isn’t one of them.
Wow. Is this actually a major concern with some people?
Around D.C., there's this tendency for employers to be very open with what languages you've used before.
Have you only used Ada? Welcome on-board, though we have no uniforms here.
Only used Erlang? Are you guys still saying you can see the whitehouse from your building?
And for some reason C#/Java are considered almost the same language, depending on whom you talk to.
Honestly, good people are good, and we don't have enough of them to become picky about demanding 5+ years experience in exactly what you are already doing. It'll take a month to onboard someone regardless of if they've used the language or not before.