Added instructions in readme file on how to contribute with a new language.

README.md

@@ -55,6 +55,26 @@ You can also run the bot on [Docker](http://docker.com). This allows easy
 server migration and automates the download of all dependencies. Look at the
 [docker specific documentation](docker/README.md) for more details.
 
+### Adding a New Language
+
+Actual language support is based on external JSON files that contains all bot texts for each language.
+
+To add support for a new language you must follow next steps:
+
+1. Fork the project repository, clone it to local and create a new branch to work on it (i.e. named language-support-en).
+
+2. Copy from one of the existing language JSON files from [here](https://github.com/J-Rios/TLG_JoinCaptchaBot/tree/master/sources/language) to a new one.
+
+3. Change the name of that file for the language ISO Code of the language that you want.
+
+4. Translate each text from JSON key values of the file without breaking the JSON format/structure (it should be valid for JSON parsers) and maintaining JSON keys names. Keep commands names in english (i.e. don't translate "START", "HELP"... /start /help ...) and don't remove special characters (like {}, ", ', \n...) too!
+
+5. Make a pull request of that branch with the new language file into this repository and wait to be accepted.
+
+6. Then, I will make the integration into source code and actual Bot account (@join_captcha_bot).
+
+7. Enjoy the new language :)
+
 ### Languages Contributors:
 
  - French: [Mathieu H (Aurnytoraink)](https://github.com/Aurnytoraink)