Curricula Vitae / Résumés ⇒ How to add skill bars using tikz pgf?

[souren]

Hi everyone,

First off: thanks for the cool templates, very helpful.
Second: here is my question:
I would like to add a skill bar such as this one (language skills) to classicthesis-styled-cv, how can I do that?

I had a look at 'altacv.cls' from the first link and it is using 'tikz' for creating skill bars, I tried to recreate the same thing but I didn't succeed! would you please help me out here?
Here is the source files to altacv in case you need to have a look. click here.
Thanks a bunch