what are some signs an introvert girl likes you?

When you are in a circle of friends they will stand slightly closer to you then anyone else and when you talk they seem to pay more attention to what you are saying compared to what the group is discussing.

there's a lot of local/cultural factors

best is to just listen to your inner voice, i guess.

Mine just says "KILL GOKU KILL GOKU"
There sure is no all encompassing, easy answer, but that is a little off. Like telling a color blind person to "just look at the color".
- I think the better advice is to find a trusted friend in one's local culture instead of troll-y internet randos who could be on the other side of the world.

If you're interested then go ask.
Don't try to figure it all out ahead of time.

"Hey i think you're really cool! Want to go [grab a coffee] with me?"
[Any low stakes public social activity]
Bonus points if you tailor it to shared interests.
- she told me she doesn’t want to go outside because men stare at her and it makes her embarrassed
  we both are raised in strict hanafi families

What's the context and age? Does she laugh at your jokes more than with other people's jokes? Really it's hard to know because you need to first establish the person's baseline.

Like for example whoever suggested the hair behind the ear thing, it could be, but it also could be that they do that too often. I'm one of these too oftens for hair behind the ear and I tend to gesture more at my ears too because I can't always hear perfectly.

So, yeah there's a hundred tell tale signs but you first need to have something to compare them to.

Well she came up to me and hit on me once. Later she signed some paperwork to make me her wife. I'm pretty sure she likes me after all that

She could be Canadian. Keep your wits about you and watch for signs..

The hair behind ear thing with eye contact

Be careful with this one. As someone who has to be intentional about making eye contact, it does not mean I like you.
And moving hair is just... moving hair.
- Agreed, as one with long hair I do the thing with pushing them behind my ears so it won't be in my face
- But also many people adjust hair when attracted to someone. It's subtle but it's not like these indicators are abundant so take it for what it is

You could ask

Who passes to the right??? There's even an instructional song on this