I18n: Update translation ja (100%).

111 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation is (73%).

82 translated messages, 29 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Add new translation oc (100%).

111 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).