I don't believe there is a language called "Roman". In Italian, which they speak currently in Rome, it is la sorella. For sisters, it's le sorelle.
In Latin, which they used to speak in Rome, I think it is soror
"Forever your beautiful sister" in English is Per sempre tua sorella bella in Italian and In perpetuum tua soror pulcherrima in Latin.
Vivere in Italian and Latin means "to live" in English.
Questa in Italian means "this" in English.
"Laura" in English is Laura in Italian since the name is of Latin origin.
Cara is an Italian equivalent of the Latin word cārā. The feminine singular adjective translates into English from Latin as "beloved" and as "dear" or "expensive" from Italian. The pronunciation will be "KA-ra" in Latin and Italian.
Coltello is a literal Italian equivalent of the Latin word culter. The masculine singular noun in question may be translated literally into English as "knife." The pronunciation will be "kol-TEL-lo" in Italian.
Grazie! is an Italian equivalent of the English phrase "Thank you!" Benigne serves as the Latin equivalent. The respective pronunciations will be "GRA-tsyey" in Italian and "beh-NIHG-ney" in classical Latin and "beh-NEE-nyey" in Church Latin.
Tempo di Foatrett in Italian means "Foatrett time (tempo)" in English.
The word boutique is said the same in Latin as it is in English. This word is also said the same in Spanish, Italian, and French.
"Life" is an English equivalent of the Italian and Latin word vita. The feminine singular noun will be found more accurately spelled vīta in classical Latin. The pronunciation will be "VEE-ta" in Italian and "WEE-tuh" in classical Latin.
Fine is an Italian equivalent of the Latin word finis. The feminine singular noun translates literally from Italian to English as "end." The respective pronunciations will be "FEE-ney" in Italian and "fee-nihs" in Latin.
Colpa is an Italian equivalent of the Latin word culpa. The feminine singular noun translates into English as "fault." The respective pronunciation will be "KOL-pa" in Italian and "KUHL-pa" in Latin.