I Completed my work on best-users-per-month plugin version 1.3.0
In this version you get these features:
1) Separated language files in lang subfolder
2) Set number of best users shown in widget and page from admin page.
3) External users table compatibility.
4) Remove some users from the list, from admin page
5) Set number and title of awards from admin page.
Thank you Kai
Here on Github
Please let me know about bugs, your needs and offers :)