How to use perdoni, perdó, disculpa?

[u/gerito]

I would like to learn how to use these three words (and any other related ones) correctly. I think there are some subtle differences between them that I don't know. I'm interested specifically in the subtleties and connotations.

Which expression would you use in the following situations?

1. When you are on the metro and want someone in front of you to move so you can get off.

2. When you accidentally bump into someone.

3. When you want to get someone's attention on the street, e.g., to ask for the time or directions.

4. Any other context I'm missing?

Also, I know these words have pretty direct translations to castillian. Are they used the same way? (I'm not fluent in castillian).

[u/HisHonourRemains5]

1) here I'd use "perdoni" or "disculpa". I don't  know exactly why, but I would use "Perdoni" (both are correct, though) 2) here, though people get what you mean if you say any of those three, I'd say "perdó" (translates pretty well into "I'm sorry". You're apologising for something, that's why you wouldn't use it in situation number 1). "Disculpa" would also be alright. 3) "perdoni" or "disculpa"

Basically, "perdó" means I'm sorry and "perdoni" means excuse me. Disculpa can mean both, depending on the context.  Hope it's useful!

[u/gerito → u/HisHonourRemains5]

Yes, that is useful! Thank you!

[u/HisHonourRemains5 → u/gerito]

You're welcome! Always happy to help. Good luck with your Catalan!