Any form view, having proper translation set, is displayed without translation when called from a kanban view grouping column configuration edit button....

I tried to force lang to fr_FR through context in the form view, but doesn't work !

I had to change directly the view in french for crm.stage.form, to fix the problem, but it's not a solution

and don't want to do that for other object than can be used as kanban grouping criteria...

Somewhere the 'lang' parameter should be injected, in the context for the view to be translated, but don't know where to do that...

Does any one have an idea how to fix this issue ?

Thanks in advance