How do you say that in English?

I bought a book yesterday. The title is "How do you say that in English?". I think I have to study English harder before I go to Minnesota. This book has a lot of phrase. For example, Japanese "Itadakimasu!" , there is some phrase in English.If we are asked to the party, host will say "Shall we begin?". And we will say "Everything looks delicious!!". If we are familiar with each other, we can say "Let's eat!"