We counted to 20 in Italian, let's keep going!
21 ventuno - sounds like vay-n-too-noh /?/
22 ventidue - sounds like vay-n-tee-doo /?/
23 ventitré - sounds like vay-n-tee-t-day /?/
24 ventiquattro - sounds like vay-n-tee-koo-ah-t-doh /?/
25 venticinque - sounds like vay-n-tee-chee-n-koo-ay-ee /?/
26 ventisei - sounds like vay-n-tee-say-ee /?/
27 ventisette - sounds like vay-n-tee-set-ay-ee /?/
28 ventotto - sounds like vay-n-tee-oh-toh /?/
29 ventinove - sounds like vay-n-tee-noh-vay /?/
(from: wikipedia - Goethe Institute)
German:
einundzwanzig, zweiundzwanzig, dreiundzwanzig, vierundzwanzig, fünfundzwanzig, sechsundzwanzig, siebenundzwanzig, achtundzwanzig, neunundzwanzig
Spanish:
veintiún, veintidós, veintitrés, veinticuatro, veinticinco, veintiséis, veintisiete, veintiocho, veintinueve
French:
vingt et un, vingt-deux, vingt-trois, vingt-quatre, vingt-cinc, vingt-six, vingt-sept, vingt-huit, vingt-neuf