So I’m still learning to use WordPress and decided to style the default theme a bit. I went to the theme folder and opened up the first CSS file I found which was ‘rtl.css’. I added a background color to the <code> tag, saved the file, and refreshed my page… nothing. Tried it again and nothing. I went back to the theme folder and noticed a ‘style.css’ file. Opened that up, made changes to the <code> tag, saved and reloaded and it worked! So what’s this ‘rtl.css’ file? A quick Google search gave me the following answer:

“rtl.css is called when you are using a language localization that reads from right to left (e.g., Arabic or Hebrew).” – source

Well now I know and so do you.