Siamo felici! is an Italian equivalent of the English phrase "We are happy!" The first person plural subject pronoun noi ("we") need not be included, other than for emphasis, since context and verb endings tend to make the subject clear in Italian. The pronunciation will be "SYA-mo fey-LEE-tchee" in Italian.
"I am happy!" in English is Sono felice! in Italian.
"You are happy!" in English is Tu sei felice! in Italian.
"Happy home!" in English is Casa felice! in Italian.
"I am happy with you!" in English is Sono felice con te!in Italian.
Infelice
"Happy birthday, auntie!" in English is Buon compleanno, zietta! in Italian.
"I'm happy for you" in English means Sono felice per tein Italian.
Così felice! in Italian is "So happy! in English.
Buona vita
Sei felice con me?
"Happy 80th birthday!" in English is Auguri di buon ottantesimo compleanno! in Italian.
"I am very happy that you wrote to me" in English is Sono molto felice che mi scrivesti in Italian.