Create category template

I need someone to create a category template for my K2 website. The template will display all the subcategories belonging to the category which is using this template. And I want to see below each subcategory, the list of articles belonging to that subcategory (with a link to the given article of course). I want the same structure as in the screenshot attached. Important: - I am not looking for someone to write manually the articles list in the subcategory description. I need someone to code a template that I can then use for the categories of my choice. - Should support multilanguage website - I want a clean code