Can u please translate the following into english:

1.  anh la nguoi Vietnam dung khong? neu khong dung la minh khong chat nua
2.  tra loi mau
3.  khong dung la khong chat nua dau
4.  nguoi nuoc ngoai khong the nao viet chinh xac nhu vay?

Number one says "You (to a guy) are Vietnamese am I right? If not,
then we can no longer chat.

Number two says "Answer quickly."

Number three says "If not (true) then we can't chat anymore.

Number four says "A foreigner can be writing (apparently vietnamese)
that accurately.

My translation is:

1/ Are you, guy, Vietnamese?
2/ If not, I won't chat with you.
3/ Are a foreigner not able to write correctly like that?

Hope this may help