Spoken Language: English | Vietnamese

Sounds good!

Did we leave out the CN country and companies for a reason?

The field is only for production companies. If you think Tencent Pictures is also a producer, I need proof.

kaiju spinoff (since sequel and prequel gone)

kaiju is a genre. So it's a very good keyword. No comment on the other one (can't say I agree with the deletion).

On lang drop down non-existing et-et appears at top and creates Estonia. Bug?

Do you mind reporting the issue in the Website Support section?

Think I have asked before, but for whatever reason FR translated title adds a space and that is not a dupe title?

No, it's fine. It's different enough: "translated titles with very small difference in space, punctuation, capitalization from the original title are accepted."