20 (twenty)

"ershi"
(Chinese)

"dvadeset"
(Croatian)

"dvacet"
(Czech)

"tyve"
(Danish)

"twintig"
(Dutch)

"kaksikymmentä"
(Finnish)

"vingt"
(French)

"zwanzig"
(German)

"húsz"
(Hungarian)

"venti"
(Italian)

"nijuu"
(Japanese)

"tjue"
(Norwegian)

"dwadziescia"
(Polish)

"vinte"
(Portuguese)

"douazeci"
(Romanian)

"veinte"
(Spanish)

"tjugo"
(Swedish)

"yirmi"
(Turkish)

"dau deg"
(Welsh)

http://www.marijn.org/everything-is-4/counting-0-to-100