one, uno
two, dos
three, tres
four, cuatro
five, cinco
six, seis
seven, siete
eight, ocho
nine, nueve
ten, diez
eleven, once
twelve, doce
thirteen, trece
fourteen, catorce
fifteen, quince
sixteen, dieciséis
seventeen, diecisiete
eighteen, dieciocho
nineteen, diecinueve
twenty, veinte
twenty-one, veintiuno
twenty-two, veintidós
twenty-three, veintitrés
twenty-four, veinticuatro
twenty-five, veinticinco
twenty-six, veintiséis
twenty-seven, veintisiete
twenty-eight, veintiocho
twenty-nine, veintinueve
thirty, treinta