I'm not Irish, so Derry is just as exotic as shibboleth. English is made of Greek and Latin and German and more; it's weird to say that one of those languages

I'm not Irish, so Derry is just as exotic as shibboleth. English is made of Greek and Latin and German and more; it's weird to say that one of those languages is exotic, but weirder still to level that complaint against the oldest known word whose meaning hinges on it being intentionally exotic. Finally, Londonderry/Derry is a disagreement, not a shibboleth. Shibboleth is about having the ability to pass as a native, not the preference to do so. In modern IT terms, It's something you are, not something you know.