This is a lot of work which can be done partly but: You will get help and learn regular expressions, HTML, CSS and Jekyll on the way.
You can add your own language.

• You can link it on the index.html page and write "(work in progress)" so that it is live but not expected to be complete and others can join.
• You can start translating from English or German
• Have a look at the steps folder for the different steps and an explanation of how to translate the steps.
• You can add your name to the CCby license in your language at the bottom of the tutorial.

Hints:

• Translation description