Replace vs. exchange vs. switch

You can look up meanings in a dictionary. I will give you a few examples

1. John is fluent in both English and Spanish. He can easily switch from one language to the other whenever he needs. (only switch works here)

2. John and I got into a fight last night. Oh boy, it was quite a nasty exchange of words. (only exchange works here)

3. This morning, Israelis and Palest

I think this is a terribly difficult question to answer, even for a native speaker who can easily recognise when the right or wrong word is being used in some specific situation. I thought about it for a couple of minutes and then gave up, I'm afraid.

i can't understand why can't write : He can easily exchange from one language to the other whenever he needs.

No, not really.

In the above sentence switch functions like an on/off switch. Exchange is used for more permanent situations like

Your car is so cool. Do you want to exchange cars with me (for a week)? (less formal - Do you want to switch cars with me?)

Hi,
I'm Dutch and I've come across a problem in English which I really can't figure out. I just saw this question and I have another one about this problem and I was hoping anyone here could help me. So I've received shoes from the UK, but they're too small, so I want to have a pair which is a bigger size. I want to send them back to get this done, but now I found a problem. At the return inst

Replace would get you the same size. - Same product is REPLACED
Exchange would get you a different size. - Similar product is EXCHANGED

very very clear, thanks so much.

Also, you exchange something if there is nothing technically wrong with it, but it's the wrong color or size or the wrong product. You replace something if there is something technically wrong with it (e.g. if a gadget is broken or has a hole in it).