Problem with slug

I have a problem with slug translation;

I use qtranslate, with qtranslate slug; all works fine, but i have notice that when i remove the last slash from the url translated, ( from http://www.societatrasportibergamo.it/en/business-service/cranes-rental/ to http://www.societatrasportibergamo.it/en/business-service/cranes-rental ), instead go to the right page, the “/en/” disappears, go to a 404 page and all appears in the default language

How i can solve this ?

thank’s for developing this usefull plugin.

https://wordpress.org/plugins/qtranslate-slug/