"Hey you!" and "You who... !" are the respective English equivalents of the Spanish and Italian phrase Tu che... ! Context makes clear which option suits. The respective pronunciations will be "too key" in Italian and "too tchey" in Spanish.
Che in Italian means "that" in English.
"What" in English is Che?, Che cosa? or Cosa? in Italian.
"What was that?" in English is Che cosa era? in Italian.
"Hey!" in Spanish to English translation and "that," "what," "which" or "who" in Italian to English translations are equivalents of the Italian and Spanish word che. Context makes clear which option suits in Italian, where the word serves as a conjunction (case 2) or an interrogative (examples 3, 4, 5). The respective pronunciations will be "key" in Italian and "tchey" in Spanish.
Che bono che sei! in Italian means "How attractive you are!" in English.
Che cosa
"What will be, will be!" in English is Sarà quel che sarà! in Italian.
"Yum!" in English is Che buono! in Italian.
"It is what it is!" in English is È quello che è! in Italian.
"Of course not!" in English is Certo che no! in Italian.
"How pretty!" in English is Che carina! in Italian.
"What is...?" in English is Cos'è...? in Italian.