diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/letter.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/letter.tt
index c394f80219..0845c45b12 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/letter.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/letter.tt
@@ -416,9 +416,9 @@
                                                 <input type="hidden" name="lang" value="[% lang | html %]" />
                                                 <label for="is_html_[% letter.message_transport_type | html %]_[% lang | html %]">HTML message:</label>
                                                 [% IF letter.is_html %]
-                                                    <input type="checkbox" name="is_html_[% letter.message_transport_type | html %]" id="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" value="1" checked="checked" />
+                                                    <input type="checkbox" name="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" id="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" value="1" checked="checked" />
                                                 [% ELSE %]
-                                                    <input type="checkbox" name="is_html_[% letter.message_transport_type | html %]" id="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" value="1" />
+                                                    <input type="checkbox" name="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" id="is_html_[% letter.message_transport_type | html %]_[% lang | html %]" value="1" />
                                                 [% END %]
                                             </li>
                                             <li>
diff --git a/tools/letter.pl b/tools/letter.pl
index a673fa96a9..2c5481e6cd 100755
--- a/tools/letter.pl
+++ b/tools/letter.pl
@@ -290,10 +290,10 @@ sub add_validate {
     my @content       = $input->multi_param('content');
     my @lang          = $input->multi_param('lang');
     for my $mtt ( @mtt ) {
-        my $is_html = $input->param("is_html_$mtt");
+        my $lang = shift @lang;
+        my $is_html = $input->param("is_html_$mtt\_$lang");
         my $title   = shift @title;
         my $content = shift @content;
-        my $lang = shift @lang;
         my $letter = C4::Letters::getletter( $oldmodule, $code, $branchcode, $mtt, $lang );
 
         # getletter can return the default letter even if we pass a branchcode