issue #11: add links to translations and documentation on creating a new translation

Author: sebastianheuer

README.md

@@ -1,3 +1,25 @@
+# Translations
+
+Each translation of the documentation is maintained in a separate 
+repository:
+
+* [English Documentation](https://github.com/sebastianbergmann/phpunit-documentation-english)
+* [Spanish Documentation](https://github.com/sebastianbergmann/phpunit-documentation-spanish)
+* [French Documentation](https://github.com/sebastianbergmann/phpunit-documentation-french)
+* [Brazilian Portuguese Documentation](https://github.com/sebastianbergmann/phpunit-documentation-brazilian-portuguese)
+* [Japanese Documentation](https://github.com/sebastianbergmann/phpunit-documentation-japanese)
+* [Simplified Chinese Documentation](https://github.com/sebastianbergmann/phpunit-documentation-chinese)
+
+## Adding a new translation
+
+If you want to create a new translation, please open an issue in the issue
+tracker of the English documentation, stating which language you would like to
+translate. A repository will be created and added to the available translations.
+
+Ideally, you would already have prepared a first version based on a fork or
+a copy of the English documentation, which will then be imported into the 
+official repository. 
+
 # Building the Documentation
 
 ## Requirements