Please, thank you, and the basics of being polite.

• Si us plauPlease
• GràciesThank you
• Moltes gràciesThank you very much
• De resYou're welcome (lit. 'of nothing')
• PerdóSorry / Excuse me (to apologize or get attention)
• DisculpiExcuse me (formal, to one person; informal 'disculpa')
• Ho sentoI'm sorry (sincere apology, lit. 'I feel it')
• SíYes
• No
• D'acordOK / Agreed
• BenvingutWelcome (said to a man; fem. 'benvinguda', pl. 'benvinguts/benvingudes')
• Salut!Cheers! / Bless you! (lit. 'health')