There's something about these Nahuatl words that moves me to commit doggerel (no pun intended). For instance:
Three Nahuatl tonguetwisters
Popocatepetl: Sure, it's a volcano. But it's also a word that'll test your mettle. Itzcuintli: Sacred dog of the Aztecs, beloved by Frida Kahlo, ugly as a Sharpei but not quite as crinkly. Quetzalcoatl: Not just a plumed serpent god beloved by D.H. Lawrence among others, but also a word that's hard to say, in fact if it doesn't make you stammer and stutter, I dunno what'll.