For several years, WordPress users have had the option to help translate the WordPress.com interface for any of the 105 languages supported by WordPress. The tool is called the In-Page Translation.
Using the In-Page Translation is as simple as following 3 steps for WordPress.com users:
- In the Admin Panel, hover over your name/Gravatar in the upper right corner.
- Click on Translate WordPress.com.
- The In-Page Translator will appear on the left hand side.
- Scroll through the list to find a text string that you want to translate. Enter your best translation for the string and save it.