I was just joking, nothing more.

我只是开个玩笑而已。

Don't be mad, I was just joking.

别生气，我只是开玩笑。

We were just joking, not trying to mock you.

我们只是开玩笑，并不是要调侃你。

Don't listen to his nonsense, he's just joking.

别听他胡说，他只是开玩笑。

Don't be mad! I'm just joking.

不要生气了，我只是开玩笑。

Don't get angry. I was just joking.

别生气了，我只是开开玩笑。（动词）

I didn't mean any harm. I was just joking.

我并没恶意，我不过开个玩笑。

This makes Sayaka nervous, but Ai says just joking.

这使得早矢香紧张，但爱说：“只是开玩笑”。

You know I'm just joking , but it stays my secret.

你知道我在开玩笑，但是那的确是我的秘密。

Alex: I'm just joking. But some people do like to eat turtles.

阿莱克斯：我开个玩笑。但是有一些人确实喜欢吃海龟。