Remember that to say thank you in Italian, you say grazie.
To ask if someone speaks Italian, you say Parli italiano?.
It sounds like pah-r-lee ee-tah-lee-ah-no /?/
To say yes you would say sì which sounds like see /?/
or to say no you would say no which sounds like no /?/

(from: wikipedia - accademia della crusca)
To say it in German:
Sprechen Sie Deutsch?.
To say it in Spanish:
¿Hablas español?
To say it in French:
parlez-vous français?