a11y.css currently exists in English, French, Chinese, Russian, Portuguese, Arabic, Greek, Spanish, Polish and Dutch: you'll find all those files in the css folder. That being said, translating a11y.css in another language is quite easy to do.

1. Add a translation file in sass/locales folder named after your language (e.g. _fr.scss);

2. Copy sass/a11y-en.scss, rename it a11y-<your-language>.scss and change the first import statement to @import 'locales/<your-language>';;

3. Repeat step 2 with:

• a11y-<your-language>_error.scss;
• a11y-<your-language>_warning.scss;
• a11y-<your-language>_obsolete.scss;

4. Finally run npm run build to generate new CSS files.

Your PR diff should:

• add /sass/locales/_<your-language>.scss;
• add 4 SCSS files in /sass/.

Done!