diff --git a/themes/default/lib/Lufi/I18N/en.po b/themes/default/lib/Lufi/I18N/en.po
index aa2a078..668ac2f 100644
--- a/themes/default/lib/Lufi/I18N/en.po
+++ b/themes/default/lib/Lufi/I18N/en.po
@@ -293,7 +293,7 @@ msgid "Send with your own mail software"
 msgstr ""
 
 #: themes/default/templates/index.html.ep:105
-msgid "Sending part XX1 of XX2"
+msgid "Sending part XX1 of XX2. Please, be patient, the progress bar can take a while to move."
 msgstr ""
 
 #. (url_for('/')
diff --git a/themes/default/lib/Lufi/I18N/fr.po b/themes/default/lib/Lufi/I18N/fr.po
index 14f7a8a..9ba7016 100644
--- a/themes/default/lib/Lufi/I18N/fr.po
+++ b/themes/default/lib/Lufi/I18N/fr.po
@@ -295,8 +295,8 @@ msgid "Send with your own mail software"
 msgstr "Envoyer avec votre propre logiciel de mail"
 
 #: themes/default/templates/index.html.ep:105
-msgid "Sending part XX1 of XX2"
-msgstr "Envoi du fragment XX1 sur XX2"
+msgid "Sending part XX1 of XX2. Please, be patient, the progress bar can take a while to move."
+msgstr "Envoi du fragment XX1 sur XX2. Veuillez patienter, la barre de progression peut mettre du temps avant d'avancer."
 
 #. (url_for('/')
 #: themes/default/templates/mail.html.ep:87
diff --git a/themes/default/templates/index.html.ep b/themes/default/templates/index.html.ep
index 0b87b94..f632d7f 100644
--- a/themes/default/templates/index.html.ep
+++ b/themes/default/templates/index.html.ep
@@ -102,7 +102,7 @@ var i18n    = {
     hits:        '<%= l('Hit Enter, then Ctrl+C to copy all the download links') %>',
     mailTo:      '<%= l('Send all links by email') %>',
     noLimit:     '<%= l('No expiration delay') %>',
-    sending:     '<%= l('Sending part XX1 of XX2') %>',
+    sending:     '<%= l('Sending part XX1 of XX2. Please, be patient, the progress bar can take a while to move.') %>',
     wsProblem:   '<%= l('Websocket communication error') %>',
 };
 % end