I am the only Brit in the department I work in. No one gets the cultural references or British idioms I use…

Oh, fer feck’s s sake, it’s not like the U.S. hasn’t had Monty Python for fifty years. Me, after a steady diet of British motorcycle magazine’s for the last 40 years, I speak Brit just fine. But I would think the diversity and prevalence of online forums would get folks up to speed. I dunno, maybe people just don’t pay that much attention.

OTOH, I do recall an Australia coworker who expressed appreciation that he didn’t have to explain idioms to me (Oz has moto mags, too). Obviously it’s a real problem even in this age of connections.