I mean, in Ireland she probably could. Anywhere else? I'm guessing no.My honest question is are languages with absurdity such as these we've discussed grammatically and phonetically consistent enough that you could say these words to a native speaker, and they'd know how to spell them or even recognize them. As in the case of @Chimpzy 's ex: could she walk into a Starbucks and the barista ask for her name, she says "Kwee-vah," and the barista's just like "of course, 'C-A-I-O-M-H-E', duh."
As for "lentokonesuihkuturbiinimoottoriapumekaanikkoaliupseerioppilas", it means "airplane jet turbine engine auxiliary mechanic non-commissioned officer student", so I'm assuming someone training to become a sargeant or whatever who works as junior mechanic on military plans. Because Finnish is one of those languages where it's theoretically possible to make infinitely long compound words by adding more and more descriptors, and have that make grammatical sense. I'm guessing a Finnish person could spell it, because mostly made up of otherwise common words the average person should know. Someone in the Finnish air force would certainly know.