diff --git a/cfp/templates/cfp/proposal_dashboard.html b/cfp/templates/cfp/proposal_dashboard.html
index 0fabb3c..8f6844a 100644
--- a/cfp/templates/cfp/proposal_dashboard.html
+++ b/cfp/templates/cfp/proposal_dashboard.html
@@ -15,7 +15,7 @@
   </h1>
 </div>
 
-<h3>{% trans "Your informations" %}</h3>
+<h3>{% trans "Your information" %}</h3>
 
 <p>
   <ul>
diff --git a/cfp/templates/cfp/staff/participant_details.html b/cfp/templates/cfp/staff/participant_details.html
index 35dc4b3..4173bcc 100644
--- a/cfp/templates/cfp/staff/participant_details.html
+++ b/cfp/templates/cfp/staff/participant_details.html
@@ -25,7 +25,7 @@
 <p>{{ participant.notes|linebreaksbr }}</p>
 {% endif %}
 
-<h2>{% trans "Informations" %}</h2>
+<h2>{% trans "Information" %}</h2>
 <ul>
     {% if participant.vip %}<li><b>{% trans "Invited speaker" %}</b></li>{% endif %}
     <li><b>{% trans "E-mail:" %}</b> <a href="mailto:{{ participant.email }}">{{ participant.email }}</a></li>
diff --git a/cfp/templates/cfp/staff/volunteer_details.html b/cfp/templates/cfp/staff/volunteer_details.html
index f54c5fd..448159d 100644
--- a/cfp/templates/cfp/staff/volunteer_details.html
+++ b/cfp/templates/cfp/staff/volunteer_details.html
@@ -28,7 +28,7 @@
 
 {% for activity in volunteer.activities.all %}
 {% if forloop.first %}
-{% trans "The volunteer applied for following activities:" %}
+{% trans "This volunteer applied for the following activities:" %}
 <ul>
 {% endif %}
     <li>
@@ -38,7 +38,7 @@
 </ul>
 {% endif %}
 {% empty %}
-{% trans "The volunteer does not applied for any activities." %}
+{% trans "This volunteer hasn't applied for any activities." %}
 {% endfor %}
 
 
diff --git a/cfp/templates/cfp/volunteer_dashboard.html b/cfp/templates/cfp/volunteer_dashboard.html
index e11322d..5310108 100644
--- a/cfp/templates/cfp/volunteer_dashboard.html
+++ b/cfp/templates/cfp/volunteer_dashboard.html
@@ -17,7 +17,7 @@
 </div>
 
 
-<h2>{% trans "Your informations" %}</h2>
+<h2>{% trans "Your information" %}</h2>
 
 <div class="row">
   <div class="col-md-12">
diff --git a/cfp/templates/cfp/volunteer_enrole.html b/cfp/templates/cfp/volunteer_enrole.html
index 2be1f15..340d423 100644
--- a/cfp/templates/cfp/volunteer_enrole.html
+++ b/cfp/templates/cfp/volunteer_enrole.html
@@ -9,7 +9,7 @@
 
 <div class="page-header">
   <h1>
-    {% trans "Become a volunteers!" %}
+    {% trans "Become a volunteer!" %}
   </h1>
   {% blocktrans %}We need you! To participate, please enter your name and e-mail and select the activities you are interested in.{% endblocktrans %}
 </div>
diff --git a/cfp/views.py b/cfp/views.py
index cb78971..d688fbf 100644
--- a/cfp/views.py
+++ b/cfp/views.py
@@ -120,7 +120,7 @@ def volunteer_mail_token(request):
                 subject=_("[%(conference)s] Someone asked to access your profil") % {'conference': request.conference},
                 content=body,
             )
-            messages.success(request, _('A email have been sent with a link to access to your profil.'))
+            messages.success(request, _('An email has been sent with a link to access to your profil.'))
             return redirect(reverse('volunteer-mail-token'))
     return render(request, 'cfp/volunteer_mail_token.html', {
         'form': form,
@@ -331,7 +331,7 @@ Thanks!
             },
             content=body,
         )
-        messages.success(request, _('Your proposition have been successfully submitted!'))
+        messages.success(request, _('Your proposition has been successfully submitted!'))
         return redirect(reverse('proposal-talk-details', kwargs=dict(speaker_token=speaker.token, talk_id=talk.pk)))
     return render(request, 'cfp/proposal_home.html', {
         'speaker_form': speaker_form,
@@ -372,7 +372,7 @@ Sincerely,
                 },
                 content=body,
             )
-            messages.success(request, _('A email have been sent with a link to access to your profil.'))
+            messages.success(request, _('An email has been sent with a link to access to your profil.'))
             return redirect(reverse('proposal-mail-token'))
     return render(request, 'cfp/proposal_mail_token.html', {
         'form': form,
@@ -414,7 +414,7 @@ def proposal_talk_edit(request, speaker, talk_id=None):
         else:
             # TODO: it could be great to receive the proposition by mail
             # but this is not crucial as the speaker already have a link in its mailbox
-            messages.success(request, _('Your proposition have been successfully submitted!'))
+            messages.success(request, _('Your proposition has been successfully submitted!'))
         return redirect(reverse('proposal-talk-details', kwargs=dict(speaker_token=speaker.token, talk_id=talk.pk)))
     return render(request, 'cfp/proposal_talk_form.html', {
         'speaker': speaker,
@@ -584,17 +584,17 @@ def talk_acknowledgment(request, talk_id, confirm):
     talk.confirmed = confirm
     talk.save()
     if confirm:
-        confirmation_message= _('The speaker confirmation have been noted.')
+        confirmation_message= _('The speaker confirmation has been noted.')
         action = _('confirmed')
-        thread_note = _('The talk have been confirmed.')
+        thread_note = _('The talk has been confirmed.')
     else:
-        confirmation_message = _('The speaker unavailability have been noted.')
+        confirmation_message = _('The speaker unavailability has been noted.')
         action = _('cancelled')
-    thread_note = _('The talk have been %(action)s.') % {'action': action}
+    thread_note = _('The talk has been %(action)s.') % {'action': action}
     send_message(
         thread=talk.conversation,
         author=request.user,
-        subject=_("[%(conference)s] The talk '%(talk)s' have been %(action)s.") % {
+        subject=_("[%(conference)s] The talk '%(talk)s' has been %(action)s.") % {
             'conference': request.conference,
             'talk': talk,
             'action': action,
@@ -695,7 +695,7 @@ def talk_list(request):
                 send_message(
                     thread=talk.conversation,
                     author=request.user,
-                    subject=_("[%(conference)s] The talk '%(talk)s' have been %(action)s") % {
+                    subject=_("[%(conference)s] The talk '%(talk)s' has been %(action)s") % {
                         'conference': request.conference,
                         'talk': talk,
                         'action': action,
@@ -830,7 +830,7 @@ def talk_decide(request, talk_id, accept):
                 send_message(
                     thread=participant.conversation,
                     author=request.conference,
-                    subject=_("[%(conference)s] Your talk '%(talk)s' have been %(action)s") % {
+                    subject=_("[%(conference)s] Your talk '%(talk)s' has been %(action)s") % {
                         'conference': request.conference,
                         'talk': talk,
                         'action': action,
@@ -841,7 +841,7 @@ def talk_decide(request, talk_id, accept):
         send_message(
             thread=talk.conversation,
             author=request.user,
-            subject=_("[%(conference)s] The talk '%(talk)s' have been %(action)s") % {
+            subject=_("[%(conference)s] The talk '%(talk)s' has been %(action)s") % {
                 'conference': request.conference,
                 'talk': talk,
                 'action': action,
diff --git a/doc/installation-guide.rst b/doc/installation-guide.rst
index 572f39e..845355f 100644
--- a/doc/installation-guide.rst
+++ b/doc/installation-guide.rst
@@ -12,7 +12,7 @@ Commands starting with ``$`` must be run as ``ponyconf`` user.
 Requirements
 ------------
 
-PonyConf have been tested with python 3.5 and 3.6.
+PonyConf has been tested with python 3.5 and 3.6.
 
 
 Preparation
diff --git a/locale/fr/LC_MESSAGES/django.mo b/locale/fr/LC_MESSAGES/django.mo
index c836570..36a19cf 100644
Binary files a/locale/fr/LC_MESSAGES/django.mo and b/locale/fr/LC_MESSAGES/django.mo differ
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index ac9efc9..d1f8c41 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-11-02 12:00+0000\n"
+"POT-Creation-Date: 2023-01-30 13:44+0000\n"
 "PO-Revision-Date: 2019-11-02 13:06+0100\n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -22,11 +22,11 @@ msgstr ""
 msgid "Email address"
 msgstr "Adresse e-mail"
 
-#: accounts/models.py:10 cfp/models.py:120 cfp/models.py:493
+#: accounts/models.py:10 cfp/models.py:120 cfp/models.py:491
 msgid "Phone number"
 msgstr "Numéro de téléphone"
 
-#: accounts/models.py:11 cfp/models.py:494
+#: accounts/models.py:11 cfp/models.py:492
 msgid "SMS prefered"
 msgstr "SMS préférés"
 
@@ -136,15 +136,15 @@ msgstr "Décliné"
 msgid "Waiting"
 msgstr "En attente"
 
-#: cfp/forms.py:30 cfp/forms.py:132 cfp/forms.py:258 cfp/models.py:384
+#: cfp/forms.py:30 cfp/forms.py:132 cfp/forms.py:258 cfp/models.py:382
 msgid "Confirmed"
 msgstr "Confirmé"
 
-#: cfp/forms.py:31 cfp/models.py:386
+#: cfp/forms.py:31 cfp/models.py:384
 msgid "Cancelled"
 msgstr "Annulé"
 
-#: cfp/forms.py:63 cfp/models.py:475
+#: cfp/forms.py:63 cfp/models.py:473
 msgid "Activity"
 msgstr "Activité"
 
@@ -167,13 +167,13 @@ msgstr "Catégorie"
 msgid "Title"
 msgstr "Titre"
 
-#: cfp/forms.py:110 cfp/models.py:168 cfp/models.py:471
+#: cfp/forms.py:110 cfp/models.py:168 cfp/models.py:469
 #: cfp/templates/cfp/proposal_talk_details.html:75
 #: cfp/templates/cfp/staff/talk_details.html:64
 msgid "Description"
 msgstr "Description"
 
-#: cfp/forms.py:111 cfp/models.py:122 cfp/models.py:496
+#: cfp/forms.py:111 cfp/models.py:122 cfp/models.py:494
 #: cfp/templates/cfp/staff/participant_details.html:24
 #: cfp/templates/cfp/staff/talk_details.html:83
 #: cfp/templates/cfp/staff/volunteer_details.html:22
@@ -184,7 +184,7 @@ msgstr "Notes"
 msgid "Visible by speakers"
 msgstr "Visible par les orateurs"
 
-#: cfp/forms.py:138 cfp/forms.py:264 cfp/models.py:340
+#: cfp/forms.py:138 cfp/forms.py:264 cfp/models.py:338
 #: cfp/templates/cfp/staff/talk_details.html:21
 #: cfp/templates/cfp/staff/talk_list.html:58
 #: cfp/templates/cfp/staff/track_form.html:14
@@ -222,7 +222,7 @@ msgstr "Programmé"
 msgid "Filter talks already / not yet scheduled"
 msgstr "Filtrer les exposés déjà / pas encore planifiées"
 
-#: cfp/forms.py:162 cfp/models.py:358
+#: cfp/forms.py:162 cfp/models.py:356
 #: cfp/templates/cfp/proposal_talk_details.html:89
 #: cfp/templates/cfp/staff/talk_details.html:54
 msgid "Materials"
@@ -277,7 +277,7 @@ msgstr "Envoyer un e-mail"
 msgid "Notify by mail?"
 msgstr "Notifier par e-mail ?"
 
-#: cfp/forms.py:280 cfp/models.py:491
+#: cfp/forms.py:280 cfp/models.py:489
 #: cfp/templates/cfp/staff/volunteer_list.html:43
 msgid "Email"
 msgstr "E-mail"
@@ -403,8 +403,8 @@ msgstr ""
 "L’adresse de réponse doit être une chaine de texte formatable avec un "
 "argument « token » (e.g. ponyconf+{token}@exemple.com)."
 
-#: cfp/models.py:110 cfp/models.py:166 cfp/models.py:188 cfp/models.py:218
-#: cfp/models.py:469 cfp/templates/cfp/staff/participant_list.html:54
+#: cfp/models.py:110 cfp/models.py:166 cfp/models.py:186 cfp/models.py:216
+#: cfp/models.py:467 cfp/templates/cfp/staff/participant_list.html:54
 #: cfp/templates/cfp/staff/volunteer_list.html:42
 msgid "Name"
 msgstr "Nom"
@@ -417,39 +417,39 @@ msgstr "Ce champ est uniquement visible par les organisateurs."
 msgid "Invited speaker"
 msgstr "Orateur invité"
 
-#: cfp/models.py:190
+#: cfp/models.py:188
 msgid "Label"
 msgstr "Étiquette"
 
-#: cfp/models.py:191
+#: cfp/models.py:189
 msgid "Capacity"
 msgstr "Capacité"
 
-#: cfp/models.py:220
+#: cfp/models.py:218
 msgid "Color"
 msgstr "Couleur"
 
-#: cfp/models.py:222
+#: cfp/models.py:220
 msgid "Show the tag on the public program"
 msgstr "Afficher l’étiquette sur le programme public"
 
-#: cfp/models.py:223
+#: cfp/models.py:221
 msgid "Show the tag on the staff program"
 msgstr "Afficher l’étiquette sur le programme organisateur"
 
-#: cfp/models.py:259
+#: cfp/models.py:257
 msgid "Default duration (min)"
 msgstr "Durée par défaut (min)"
 
-#: cfp/models.py:260
+#: cfp/models.py:258
 msgid "Color on program"
 msgstr "Couleur sur le programme"
 
-#: cfp/models.py:261
+#: cfp/models.py:259
 msgid "Label on program"
 msgstr "Label dans le xml du programme"
 
-#: cfp/models.py:335 cfp/templates/cfp/proposal_talk_details.html:53
+#: cfp/models.py:333 cfp/templates/cfp/proposal_talk_details.html:53
 #: cfp/templates/cfp/staff/base.html:10
 #: cfp/templates/cfp/staff/participant_list.html:16
 #: cfp/templates/cfp/staff/talk_details.html:68
@@ -457,23 +457,23 @@ msgstr "Label dans le xml du programme"
 msgid "Speakers"
 msgstr "Orateurs"
 
-#: cfp/models.py:336
+#: cfp/models.py:334
 msgid "Talk Title"
 msgstr "Titre de la proposition"
 
-#: cfp/models.py:338
+#: cfp/models.py:336
 msgid "Description of your talk"
 msgstr "Description de votre proposition"
 
-#: cfp/models.py:339
+#: cfp/models.py:337
 msgid "This description will be visible on the program."
 msgstr "Cette description sera visible sur le programme."
 
-#: cfp/models.py:342 cfp/templates/cfp/proposal_talk_details.html:99
+#: cfp/models.py:340 cfp/templates/cfp/proposal_talk_details.html:99
 msgid "Message to organizers"
 msgstr "Message aux organisateurs"
 
-#: cfp/models.py:343
+#: cfp/models.py:341
 msgid ""
 "If you have any constraint or if you have anything that may help you to "
 "select your talk, like a video or slides of your talk, please write it down "
@@ -483,51 +483,51 @@ msgstr ""
 "votre proposition, comme une vidéo, des slides, n'hésitez pas à les ajouter "
 "ici. Ce champ ne sera visible que par les organisateurs."
 
-#: cfp/models.py:347
+#: cfp/models.py:345
 msgid "Talk Category"
 msgstr "Catégorie de proposition"
 
-#: cfp/models.py:348
+#: cfp/models.py:346
 msgid "I'm ok to be recorded on video"
 msgstr "J’accepte d’être enregistré en vidéo"
 
-#: cfp/models.py:350
+#: cfp/models.py:348
 msgid "Video licence"
 msgstr "Licence vidéo"
 
-#: cfp/models.py:351
+#: cfp/models.py:349
 msgid "I need sound"
 msgstr "J’ai besoin de son"
 
-#: cfp/models.py:354
+#: cfp/models.py:352
 msgid "Beginning date and time"
 msgstr "Date et heure de début"
 
-#: cfp/models.py:355
+#: cfp/models.py:353
 msgid "Duration (min)"
 msgstr "Durée (min)"
 
-#: cfp/models.py:359
+#: cfp/models.py:357
 msgid ""
 "You can use this field to share some materials related to your intervention."
 msgstr ""
 "Vous pouvez utiliser ce champ pour partager les supports de votre "
 "intervention."
 
-#: cfp/models.py:388
+#: cfp/models.py:386
 msgid "Waiting confirmation"
 msgstr "En attente de confirmation"
 
-#: cfp/models.py:390
+#: cfp/models.py:388
 msgid "Refused"
 msgstr "Refusé"
 
-#: cfp/models.py:392
+#: cfp/models.py:390
 #, python-format
 msgid "Pending decision, score: %(score).1f"
 msgstr "En cours, score : %(score).1f"
 
-#: cfp/models.py:476 cfp/models.py:498
+#: cfp/models.py:474 cfp/models.py:496
 #: cfp/templates/cfp/admin/activity_list.html:9
 #: cfp/templates/cfp/admin/base.html:14
 #: cfp/templates/cfp/staff/volunteer_details.html:27
@@ -536,11 +536,11 @@ msgstr "En cours, score : %(score).1f"
 msgid "Activities"
 msgstr "Activités"
 
-#: cfp/models.py:490
+#: cfp/models.py:488
 msgid "Your Name"
 msgstr "Votre Nom"
 
-#: cfp/models.py:497
+#: cfp/models.py:495
 msgid "If you have some constraints, you can indicate them here."
 msgstr "Si vous avez des contraintes, vous pouvez les indiquer ici."
 
@@ -734,7 +734,7 @@ msgstr "Éditer votre profil"
 
 #: cfp/templates/cfp/proposal_dashboard.html:18
 #: cfp/templates/cfp/volunteer_dashboard.html:20
-msgid "Your informations"
+msgid "Your information"
 msgstr "Vos informations"
 
 #: cfp/templates/cfp/proposal_dashboard.html:22
@@ -976,7 +976,8 @@ msgid "Remove"
 msgstr "Supprimer"
 
 #: cfp/templates/cfp/staff/participant_details.html:28
-msgid "Informations"
+#: cfp/templates/cfp/staff/talk_details.html:12
+msgid "Information"
 msgstr "Informations"
 
 #: cfp/templates/cfp/staff/participant_details.html:39
@@ -1222,10 +1223,6 @@ msgstr "Accepter la proposition"
 msgid "Decline the proposal"
 msgstr "Décliner la proposition"
 
-#: cfp/templates/cfp/staff/talk_details.html:12
-msgid "Information"
-msgstr "Informations"
-
 #: cfp/templates/cfp/staff/talk_details.html:25
 msgctxt "session"
 msgid "not defined"
@@ -1341,11 +1338,11 @@ msgid "Email:"
 msgstr "E-mail :"
 
 #: cfp/templates/cfp/staff/volunteer_details.html:31
-msgid "The volunteer applied for following activities:"
+msgid "This volunteer applied for the following activities:"
 msgstr "Le bénévole s'est proposé pour les activités suivantes :"
 
 #: cfp/templates/cfp/staff/volunteer_details.html:41
-msgid "The volunteer does not applied for any activities."
+msgid "This volunteer hasn't applied for any activities."
 msgstr "Le bénévole ne s’est proposé pour aucune activité."
 
 #: cfp/templates/cfp/staff/volunteer_details.html:49
@@ -1392,7 +1389,7 @@ msgid "Sorry, I have a setback"
 msgstr "Désolé, j’ai un contretemps"
 
 #: cfp/templates/cfp/volunteer_enrole.html:12
-msgid "Become a volunteers!"
+msgid "Become a volunteer!"
 msgstr "Devenez un bénévole !"
 
 #: cfp/templates/cfp/volunteer_enrole.html:14
@@ -1463,7 +1460,7 @@ msgid "[%(conference)s] Someone asked to access your profil"
 msgstr "[%(conference)s] Quelqu’un a demandé à accéder à votre profil"
 
 #: cfp/views.py:123 cfp/views.py:375
-msgid "A email have been sent with a link to access to your profil."
+msgid "An email has been sent with a link to access to your profil."
 msgstr "Un e-mail vous a été envoyé avec un lien pour accéder à votre profil."
 
 #: cfp/views.py:143 cfp/views.py:413 cfp/views.py:500
@@ -1542,7 +1539,7 @@ msgid "[%(conference)s] Thank you for your proposition '%(talk)s'"
 msgstr "[%(conference)s] Merci pour votre proposition « %(talk)s »"
 
 #: cfp/views.py:334 cfp/views.py:417
-msgid "Your proposition have been successfully submitted!"
+msgid "Your proposition has been successfully submitted!"
 msgstr "Votre proposition a été transmise avec succès !"
 
 #: cfp/views.py:353
@@ -1661,39 +1658,32 @@ msgid "Co-speaker successfully removed from the talk."
 msgstr "Co-intervenant supprimé de l’exposé avec succès."
 
 #: cfp/views.py:587
-msgid "The speaker confirmation have been noted."
+msgid "The speaker confirmation has been noted."
 msgstr "La confirmation de l’orateur a été notée."
 
 #: cfp/views.py:589
-msgid "The talk have been confirmed."
+msgid "The talk has been confirmed."
 msgstr "L’exposé a été confirmé."
 
 #: cfp/views.py:591
-msgid "The speaker unavailability have been noted."
+msgid "The speaker unavailability has been noted."
 msgstr "L’indisponibilité de l’intervenant a été notée."
 
-#: cfp/views.py:593
+#: cfp/views.py:593 cfp/views.py:694 cfp/views.py:849
 #, python-format
-msgid "The talk have been %(action)s."
+msgid "The talk has been %(action)s."
 msgstr "L’exposé a été %(action)s."
 
 #: cfp/views.py:597
-#, python-format
-msgid "[%(conference)s] The talk '%(talk)s' have been %(action)s."
+msgid "[%(conference)s] The talk '%(talk)s' has been %(action)s."
 msgstr "[%(conference)s] L’exposé « %(talk)s » a été %(action)s."
 
 #: cfp/views.py:693 cfp/views.py:825
 msgid "declined"
 msgstr "décliné"
 
-#: cfp/views.py:694 cfp/views.py:849
-#, python-format
-msgid "The talk has been %(action)s."
-msgstr "L’exposé a été %(action)s."
-
 #: cfp/views.py:698 cfp/views.py:844
-#, python-format
-msgid "[%(conference)s] The talk '%(talk)s' have been %(action)s"
+msgid "[%(conference)s] The talk '%(talk)s' has been %(action)s"
 msgstr "[%(conference)s] L’exposé « %(talk)s » a été %(action)s"
 
 #: cfp/views.py:782
@@ -1710,8 +1700,7 @@ msgid "Vote successfully updated"
 msgstr "Vote mis à jour"
 
 #: cfp/views.py:833
-#, python-format
-msgid "[%(conference)s] Your talk '%(talk)s' have been %(action)s"
+msgid "[%(conference)s] Your talk '%(talk)s' has been %(action)s"
 msgstr "[%(conference)s] Votre exposé « %(talk)s » a été %(action)s"
 
 #: cfp/views.py:851
@@ -1784,11 +1773,11 @@ msgstr "Envoyer"
 msgid "No messages."
 msgstr "Aucun message."
 
-#: ponyconf/settings.py:141
+#: ponyconf/settings.py:126
 msgid "English"
 msgstr "Anglais"
 
-#: ponyconf/settings.py:142
+#: ponyconf/settings.py:127
 msgid "French"
 msgstr "Français"
 
@@ -1840,6 +1829,12 @@ msgstr "Mot de passe oublié ?"
 msgid "Password Change"
 msgstr "Changement de mot de passe"
 
+#~ msgid "Informations"
+#~ msgstr "Informations"
+
+#~ msgid "The talk have been %(action)s."
+#~ msgstr "L’exposé a été %(action)s."
+
 #~ msgid "Messages"
 #~ msgstr "Messages"