The translation for the item menu "Edit Style..." is wrong in french :
"Édit~er le style..."
That should be "Éditer le style..." without the ~
Confirmed, thanks for the report!
It's not a translation issue, but how the translation taken from core is handled.
Andras Timar committed a patch related to this issue.
It has been pushed to "master":
tdf#123500 double '~' character in translation