We counted to 20 in German, let's keep going!
21 einundzwanzig - sounds like ah-een-und-tsvan-seek /?/
22 zweiundzwanzig - sounds like svai-und-tsvan-seek /?/
23 dreiundzwanzig - sounds like duh-ai-und-tsvan-seek /?/
24 vierundzwanzig - sounds like fee-ah-und-tsvan-seek /?/
25 fünfundzwanzig - sounds like foo-nf-und-tsvan-seek /?/
26 sechsundzwanzig - sounds like zeks-und-tsvan-seek /?/
27 siebenundzwanzig - sounds like zee-bm-und-tsvan-seek /?/
28 achtundzwanzig - sounds like ah-kt-und-tsvan-seek /?/
29 neunundzwanzig - sounds like no-een-und-tsvan-seek /?/

(from: wikipedia - Goethe Institute)
Do you remember how to say it in Spanish?
veintiún, veintidós, veintitrés, veinticuatro, veinticinco, veintiséis, veintisiete, veintiocho, veintinueve
Do you remember how to say it in French?
vingt et un, vingt-deux, vingt-trois, vingt-quatre, vingt-cinc, vingt-six, vingt-sept, vingt-huit, vingt-neuf