@LTer Ok, but we are talking about US/American English here.
In US/American English, "it's all" is not an expression on its own and cannot be used like the expression "that's all" (meaning all done/finished/complete or nothing more).
Spain and Peru are not relevant here. Those are both Spanish speaking countries and have nothing to do with US/American English.
I have to be completely honest here... I'm not sure why you are answering questions in the US/American English section. Many of your answers contain errors and often you miss out on key context/nuance.
If you are going to answer questions in the US/American English section, please consider including a note indicating that you are not a native English speaker.