Translation of "kalo" into English

Maafkan aku, kata perawat tadi Tak masalah kalo aku berkunjung.

I'm sorry, the nurse said that it would be okay if I stopped by.

Aku selalu tahu kalo kau bohong karena kau tak mahir berbohong.

I could always tell when you were lying because you were never any good at it.

Nah kalo udah mau pesta kita " bubaran " deh.

And then we break up the day of the party.