Is it possible to use modifiers? Rated 5 out of 5 stars

Thanks for the great addon, its really amazing!
I want to write a layout for polish, is it possible to use modifier keys like alt or control?
I would like to do something like [["(ctrl)c","ć"],["(ctrl)l","ł"],["(ctrl)a","ą"],["(ctrl)e","ę"],...].

Is it possible? Would be so great! Thanks a lot!

This review is for a previous version of the add-on (0.7.5).