Translation of "Untrue" in Japanese

Well, this is also untrue.

これも事実ではありません

It isn't just untrue, it's dangerous,

真実でないどころか 危険です

The rumor, after all, turned out untrue.

うわさは結局うそだと分かった。

- What would you do if I were untrue to you?
- What would you do if I were untrue?

もし私が浮気したらどうする？

What would you do if I were untrue?

もし私が浮気したらどうする？

What would you do if I were untrue to you?

もし私が浮気したらどうする？

- This is not true.
- That's not true.
- It's not right.
- This is incorrect.
- This isn't correct.
- This isn't right.
- It's not true.
- That's untrue.
- That isn't right.
- That isn't true.
- That's not right.
- This is not correct.

そんなことないよ。