Mathieu, the translations are done in http://pootle.lxde.bsnet.se/ . As you can see from the link, there's not much missing for completion in French.
If you're interested you could register there and complete/revise the translations. You could also contact previous translators.

On Sun, Jun 12, 2011 at 9:26 AM, mathieu millot <mathieu.millot@gmail.com> wrote:
Hello,

Thanks in advance for your work, pcmanfm is awesome and light.

I've compiled git repo as 2011-06-11 on debian unstable.

There's some translations glitches in libfm/po/fr.po with the copy/move windows:

At line 218:
#. Processing: <Name of currently proccesed file>
#: ../data/ui/progress.glade.h:2
msgid "<b>Processing:</b>"
msgstr "<b>Procédé :</b>"

Should be:
msgstr "<b>En cours :</b>"

-------------------
#: ../data/ui/progress.glade.h:3
msgid "<b>Progress:</b>"
msgstr "<b>Progrès:</b>"

Should be:
msgstr "<b>Progression :</b>"

-------------------
At line 235:
#. To: <Destination folder> ex. Copy file to..., Move file to...etc.
#: ../data/ui/progress.glade.h:7
msgid "<b>To:</b>"
msgstr "<b>À:</b>"

Should be:
msgstr "<b>Vers:</b>"

Or long string if possible:
msgstr "<b>Destination:</b>"

I've enclosed a modified screenshot.

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