This little poem comes from the Florilegium Gottingense edited by Voigt.
Qui loquitur turpe, monstrat se vivere turpe,
Nam venit ex turpi vivere turpe loqui.
The vocabulary is keyed to the DCC Latin Vocabulary list. There is only one word in this poem that is not on the DCC list:
monstro, -āre - show, reveal, advise
ex, ē: out of, from (+ abl.)
loquor loquī locūtus sum: speak, talk
nam: for, indeed, really
qui, quae, quod: who, which, what; quis quid: who? what? which?
sui, sibi, sē: him- her- itself
turpis -e: ugly, unsightly; disgraceful
venio -īre vēnī ventum: come
vīvo -ere vīxī victum: live