🐛(i18n) add back the missing email translations

We changed the way we upload the translations to
Crowdin, some translations were missing for the
email templates. We add them back and improve
the tests to make sure we don't forget them again.

src/backend/locale/fr_FR/LC_MESSAGES/django.po

@@ -2,8 +2,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: lasuite-docs\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2025-01-29 13:43+0000\n"
-"PO-Revision-Date: 2025-01-30 10:24\n"
+"POT-Creation-Date: 2025-02-06 15:30+0000\n"
+"PO-Revision-Date: 2025-02-06 15:59\n"
 "Last-Translator: \n"
 "Language-Team: French\n"
 "Language: fr_FR\n"
@@ -391,3 +391,24 @@ msgstr ""
 msgid "German"
 msgstr ""
 
+#: core/templates/mail/html/invitation.html:162
+#: core/templates/mail/text/invitation.txt:3
+msgid "Logo email"
+msgstr "Logo de l'e-mail"
+
+#: core/templates/mail/html/invitation.html:209
+#: core/templates/mail/text/invitation.txt:10
+msgid "Open"
+msgstr "Ouvrir"
+
+#: core/templates/mail/html/invitation.html:226
+#: core/templates/mail/text/invitation.txt:14
+msgid " Docs, your new essential tool for organizing, sharing and collaborating on your documents as a team. "
+msgstr " Docs, votre nouvel outil incontournable pour organiser, partager et collaborer sur vos documents en équipe. "
+
+#: core/templates/mail/html/invitation.html:233
+#: core/templates/mail/text/invitation.txt:16
+#, python-format
+msgid " Brought to you by %(brandname)s "
+msgstr " Proposé par %(brandname)s "
+