GitLab

added simplified + traditional chinese, updates uk keys, changed standart language code format to xx-XX

Fix spacing

- Combined font-family declaration: Instead of repeating the font-family declaration for both `html` and `pre`, it's combined into one declaration to save space and avoid repetition.

- Removed unnecessary `pre` styling: The `pre` styling for `font-family` is removed as the font-family is already defined in the `html` rule.

The code is more concise and easier to read.