@scjo
Of course I will need and thanks for your willing.
At this moment is not established the English part as nor for any other languages.
I hope will be sometime in the future.

@Keet
You're right about images and the probably copyrights.
Anyway my needed image is not invented yet so, as in linux philosophy, I'll drawn myself.
Probably I will use numbers in place of terms and the same numbers at corresponding input. In this way I could avoid to make 20+ pictures corresponding to every available language.

At the moment I'm not satisfied how the stair is generated in some circumstances.
It need to be a strictly correspondence between inputted values and the final results.
Now is not always the case.