Once you're in the Settings app, click on Time & Language, then select Language & Region. This is where you can add new languages and keyboards to your Windows 11 setup. Think of it like adding a new character to your game - you've got to set them up first!
Now, click on Add a language and search for Farsi. You might also see it listed as Persian, so don't worry if you see that instead. Once you've found it, click Next and then Install. This might take a few minutes, but it's like waiting for a game update to download - it's worth the wait!