The top contenders I have experience with is: -Aesprite. It’s paid. It’s good. Built solely for pixel art.

Free stuff: -LibreSprite- this is the open version of aesprite before it went paid. I don’t know it It’s still maintained or updated, but it may suit your needs.

-pixelorama- web based made in the godot engine.

I am also learning Japanese. I fine it hard to think of the sentence structure as different than English. In my mind I find myself daying the sentences the way Yoda from star wars does and it makes more sense.

Yoda I am–>Yoda desu

I’m a math teacher. I use my video game making knowledge from Godot to make little video games to review skills. Each takes a few weeks to make with game design, making all the art, programming, and making the worksheet.

Here is my Disco Dj-Demo if you were curious what I mean.

I think it’s fun, it’s not something I can really chat with others about.