I want to block traffic from some countries or regions determined by browser language. What should I do?
This sounds like something you would do outside Bricks.
Browser language isn’t reliable (I could be living abroad, so my language doesn’t match my country).
There are server-side solutions - I think cloudflare has a block-by-country option. Then plugins like Wordfence or seccuri also allow this.
This is the route I would follow, putting the weight on the server if possible.