Not what you're asking, but tr a-z A-Z </usr/share/dict/words | grep '^[AHIMOTUVWXY]*$' gets you a subset of English. You can say things like AHOY OTTAWA AU

Not what you're asking, but tr a-z A-Z </usr/share/dict/words | grep '^[AHIMOTUVWXY]*$' gets you a subset of English. You can say things like AHOY OTTAWA AUTOMATA! YUMMY HAM: MOUTH VOMIT. MAXIMUM YOUTH.