I am using windows and a French AZERTY Keyboard
Most of the keyboard shorts cuts and pop-ups work well according to demos, except the semi colon (
key that do not go to tuplet but select the doted duration option.
Where can I found the way for tuplets??? : 
I think on a French keyboard tuplet mode is mapped to ‘=’, and then ‘+’ to end the tuplet run.
Thanks Paul for your quick reply!
unfortunately, this = seems not to work
However using the “preferences” I found the used short cut In my configuration that is " ! " and effectively it works !