One
Uno
Two
Due
Three
Tre
Four
Quattro
Five
Cinque
Six
Sei
Seven
Sette
Eight
Otto
Nine
Nove
Ten
Dieci
Eleven
Undici
Twelve
Dodici
Thirteen
Tredici
Fourteen
Quattrodici
Fifteen
Quindici
Sixteen
Sedici
Seventeen
Diciassette
Eighteen
Diciotto
Nineteen
Diciannove
Twenty
Venti
Twenty/thirty ect… + number starting with vowel
Remove the i/a and add the normal number
Eg. Twenty one - ventuno
Twenty/thirty ect… + number starting with connsonnant
Keep the i/a and add the normal number
Eg. Twenty two - ventidue
Thirty
Trenta
Forty
Quaranta