Issue with string $[This is a minor edit] in Site.EditForm

Hello,

(I'm using last pmwiki version)

What might be the reason why I get the string /This is a minor edit/
translated two times rather than only one in the edit form ?

Auteur: (field for author) (checkbox)  Modification mineure Modification mineure

In config, line with XL string are :
XLPage('fr','PmWikiFr.XLPage');
XLPage('fr','PmWikiFr.XLPageCookbook'); // S'il y a des modules

In Site/EditForm, line is :
$[Author]: (:input e_author:) (:input e_minorcheckbox:) $[This is a
minor edit]\\

In PmWikiFr/XLPage, line is :
  'This is a minor edit' => 'Modification mineure',

Any advice ? Isn't that related to recent merging diff option ? I can
not find how to get back to expected behaviour.

Thank you,
Gilles.