From W3C Wiki
The CSS Validator is currently localized in 12+1 languages: English (default), Chinese Simplified, Dutch, French, German, Italian, Japanese, Polish, Portuguese (Brazilian), Spanish, Swedish, Russian and Korean.
The validator is generally developed in English, and all documentation and messages are later translated into the other languages.
If you would like to contribute to the translations:
- Check the translation table on the developer's instance of the validator.
- If the validator is translated in your language but has some translations missing (is the percentage below 100?) you can contribute the missing ones
- If the validator is not yet translated in your language, download the translator's kit, get in touch with us and start translating