diff --git a/lib/Vroom/I18N/en.pm b/lib/Vroom/I18N/en.pm
index cb3cf18..ebeb4b5 100644
--- a/lib/Vroom/I18N/en.pm
+++ b/lib/Vroom/I18N/en.pm
@@ -8,6 +8,7 @@ our %Lexicon = (
   "VROOM_IS_FREE_SOFTWARE"               => "VROOM is a free software, released under the MIT licence",
   "POWERED_BY"                           => "Proudly powered by",
   "ERROR_NAME_INVALID"                   => "This name is not valid",
+  "ERROR_NAME_RESERVED"                  => "This name is reserved and cannot be used",
   "ERROR_NAME_CONFLICT"                  => "A room with this name already exists, please choose another one",
   "ERROR_ROOM_s_DOESNT_EXIST"            => "The room %s doesn't exist",
   "ERROR_ROOM_s_LOCKED"                  => "The room %s is locked, you cannot join it",
diff --git a/lib/Vroom/I18N/fr.pm b/lib/Vroom/I18N/fr.pm
index 1523894..6f807cf 100644
--- a/lib/Vroom/I18N/fr.pm
+++ b/lib/Vroom/I18N/fr.pm
@@ -10,6 +10,7 @@ our %Lexicon = (
     "VROOM_IS_FREE_SOFTWARE"                    => "VROOM est un logiciel libre diffusé sous licence MIT",
     "POWERED_BY"                                => "Fièrement propulsé par",
     "ERROR_NAME_INVALID"                        => "Ce nom n'est pas valide",
+    "ERROR_NAME_RESERVED"                       => "Ce nom est réservé et ne peut être utilisé",
     "ERROR_NAME_CONFLICT"                       => "Ce nom est déjà pris, choisissez en un autre",
     "ERROR_ROOM_s_DOESNT_EXIST"                 => "Le salon %s n'existe pas",
     "ERROR_ROOM_s_LOCKED"                       => "Le salon %s est verrouillé, vous ne pouvez pas le rejoindre",
diff --git a/vroom.pl b/vroom.pl
index 2675508..8c91c10 100755
--- a/vroom.pl
+++ b/vroom.pl
@@ -81,6 +81,36 @@ plugin mail => {
   type => 'text/html',
 };
 
+##########################
+#  Validation helpers    #
+##########################
+
+# take a string as argument and check if it's a valid room name
+helper valid_room_name => sub {
+  my $self = shift;
+  my ($name) = @_;
+  my $ret = {status => undef, msg => undef};
+  # A few names are reserved
+  my @reserved = qw(about help feedback feedback_thanks goodbye admin create localize action
+                    missing dies password kicked invitation js css img fonts snd);
+  if ($name !~ m/^[\w\-]{1,49}$/){
+    $ret->{msg} = 'ERROR_NAME_INVALID';
+  }
+  elsif (grep { $name eq $_ } @reserved){
+    $ret->{msg} = 'ERROR_NAME_RESERVED';
+  }
+  else{
+    $ret->{status} = 1;
+    $ret->{msg}    = 'OK'
+  }
+  return $ret;
+};
+
+
+##########################
+#   Various helpers      #
+##########################
+
 # Create a cookie based session
 helper login => sub {
   my $self = shift;
@@ -133,7 +163,7 @@ helper create_room => sub {
     $name = lc $name;
   }
   # Exit if the name isn't valid or already taken
-  return undef if ($self->get_room_by_name($name) || !$self->valid_room_name($name));
+  return undef if ($self->get_room_by_name($name) || !$self->valid_room_name($name)->{status});
   my $sth = eval {
     $self->db->prepare('INSERT INTO `rooms`
                           (`name`,`create_date`,`last_activity`,`owner`,`token`,`realm`)
@@ -492,20 +522,6 @@ helper ping_room => sub {
   return 1;
 };
 
-# Check if this name is a valid room name
-helper valid_room_name => sub {
-  my $self = shift;
-  my ($name) = @_;
-  my $ret = undef;
-  # A few names are reserved
-  my @reserved = qw(about help feedback feedback_thanks goodbye admin create localize action
-                    missing dies password kicked invitation js css img fonts snd);
-  if ($name =~ m/^[\w\-]{1,49}$/ && !grep { $name eq $_ }  @reserved){
-    $ret = 1;
-  }
-  return $ret;
-};
-
 # Generate a random token
 helper get_random => sub {
   my $self = shift;
@@ -982,10 +998,10 @@ post '/create' => sub {
   my $msg    = $self->l('ERROR_OCCURRED');
   # Cleanup unused rooms before trying to create it
   $self->delete_rooms;
-
-  if (!$self->valid_room_name($name)){
-    $err = 'ERROR_NAME_INVALID';
-    $msg = $self->l('ERROR_NAME_INVALID');
+  my $res = $self->valid_room_name($name);
+  if (!$res->{status}){
+    $err = $res->{msg};
+    $msg = $self->l($res->{msg});
   }
   elsif ($self->get_room_by_name($name)){
     $err = 'ERROR_NAME_CONFLICT';
@@ -1077,10 +1093,11 @@ get '/(*room)' => sub {
   }
   $self->delete_rooms;
   $self->delete_invitations;
-  unless ($self->valid_room_name($room)){
+  my $res = $self->valid_room_name($room);
+  if (!$res->{status}){
     return $self->render('error',
-      msg  => $self->l('ERROR_NAME_INVALID'),
-      err  => 'ERROR_NAME_INVALID',
+      msg  => $self->l($res->{msg}),
+      err  => $res->{msg},
       room => $room
     );
   }
@@ -1167,12 +1184,15 @@ post '/*action' => [action => [qw/action admin\/action/]] => sub {
            );
   }
   # Sanity check on the room name
-  return $self->render(
+  my $res = $self->valid_room_name($room);
+  if (!$res->{status}){
+    return $self->render(
            json => {
-             msg    => sprintf ($self->l("ERROR_NAME_INVALID"), $room),
+             msg    => $self->l($res->{msg}),
              status => 'error'
            },
-         ) unless ($self->valid_room_name($room));
+         );
+  }
   # Push the room name to the stash, just in case
   $self->stash(room => $room);
   # Gather room info from the DB