Dinner's almost ready.

晚饭差不多做好了。

It's almost done.

饭菜差不多弄好了。

It will be on the table in a minute.

过一会儿菜就可以上桌了。

(It's)time to eat.

可以吃饭了。

Dinners ready.

晚饭准备好了。

Please be seated at the table.

请入座吧。

Dinner is served. (formal)

可以用餐了。（正式用语）

Soup's on! (informal)

开饭了！（非正式用语）