To help translate the cogs in this repo, you need to first create a fork and clone the repository to your computer.
Next, you will need to download a program to create the translation. An example is POedit. Using a program like this, you can now open the messages.pot file located in the locales directory of every cog. You can now start translating. Once you are done translating, save the file as language-CODE.po where "language-CODE" is the language code for your country and language. Every cog includes an example for german translations.
Once you have created the .po file upload it to your fork of the repository and create a pull-request.
Note: Cogs that don't have a "locales" direcotry don't have translation support.