JUST DISCOVERED WHAT WAS MESSING AROUND WITH US
And it's f4cking stupid… 
We just didn't consider that you might have another system language and coded everything for English menus.
So, here is the walkthrough to fix it for you:
- Get to the widget, and open the Predefined Action Script.
- Scroll down until you see " activate application "SystemUIServer" " line. In this paragraph, change the two "Connect" to what is written in the Bluetooth menu in your System Language when you want to connect your AirPods (Bluetooth menu → Your AirPods → the button to connect them. In French, this should be "Connecter", it is the button at the very top).
- In the same paragraph, change the "Disconnect" to what is written in the Bluetooth menu in your System Language when you want to disconnect your AirPods (Bluetooth menu → Your AirPods → the button to connect them. In French, this should be "Déconnecter", it is the button at the very top).
Hit "save" and it should work now!
In a short time, I'll try to give a fix for the icon that changes as soon as any Bluetooth device is connected.
@yuuiko this seems to be due to this line:
I won't have the time to fix this today, but I'll hunt this one down tomorrow or so.
Also, (back to topic), I found this topic that explains how to get the NSLocalizedString with Apple Script. I will try to figure out how to use this in our case, but I do not promise anything for now… 