Lasciami entrare! and Lasciatemi entrare! are Italian equivalents of the English phrase "Let me in!" Context makes clear whether one "you" (case 1) or two or more "you all" (example 2) suits. The respective pronunciations will be "LA-sha-mee en-TRA-rey" in the singular and "la-SHA-tey-mee en-TRA-rey" in the plural in Italian.
"Let" in English is lasciare in Italian.
"Let's play!" in English means Giochiamo! in Italian.
"Let's go!" in English means Andiamo! in Italian.
lascimi avere
"Let's do it again soon!" in English means Ripetiamolo presto! in Italian.
"Let's go out to eat!" in English is Andiamo a mangiare fuori! in Italian.
"Please let us know!" in English is Fatecelo sapere! in Italian.
lasciar andare
"Let's go to the beach Saturday!" in English is Andiamo alla spiaggia sabato! in Italian.
Parliamo italiano allora! in Italian means "Therefore, let's speak Italian!" in English.
Muoviamoci! is an Italian equivalent of the English phrase "Let's roll!" The declaration translates literally as "Let's move ourselves!" in English. The pronunciation will be "mwo-VYA-mo-tchee" in Pisan Italian.
"Talk to you tomorrow!" in English means Parliamo domani!("Let's talk tomorrow!") in Italian.