Please add to my account.

请记在我的账里。

Shall we split the check？

我们大家平摊？

We'd like to pay separately.

我们分开买单。

Separate check, please.

分别买单，谢谢。

Let's go Dutch this time.

这次咱们各付各的吧。

How about we pay our own share?

我们各付各的如何？