I am not a parent and I don't personally know you. I write that because I want you to know that I don't know the specifics of your life or child rearing.
Still, I don't think 11 PM is the most appropriate time to bathe your two children and yell at them, probably because they're having fun in the tub an you just want to get the bath over with, but I can't be too sure of that since I don't understand much Spanish. I'm not writing this just because you and the kids are loud when bath time happens, even though that's the main reason. No, I'm also writing this because, and maybe it's just me, I think that it's a good idea that kids, especially young kids, need to get to sleep early so they have plenty of rest. Also, it's not a bad idea to start getting them ready for school type hours since they will start going in a couple of years.
You probably don't think it's my place to pry. And you may be right. Still, I like to sleep through the night and bath noise and yelling don't help and I do, on occasion, think about other people.
Also, those nights when there isn't a bath and you play with the kids at 11 PM, I'd like that to stop. Yes the loud laughing is annoying and wakes me up, but every time play happens at night one of the kids ends up crying and you end up yelling. And there's crying and yelling for a while, then there's a minute or two of silence before more crying and more yelling. Oh, eventually everything settles down, but it still disturbs my already strained sleep.
Your Brother in Slumber,