diff --git a/langset.sh b/langset.sh
index 4d7b1fa..2e3f8fb 100644
--- a/langset.sh
+++ b/langset.sh
@@ -64,8 +64,16 @@ set_sysconfig_option() {
 [ -z "$CONSOLE_FONT" ] || set_sysconfig_option CONSOLE_FONT "$CONSOLE_FONT"
 [ -z "$CONSOLE_SCREENMAP" ] || set_sysconfig_option CONSOLE_SCREENMAP "$CONSOLE_SCREENMAP"
 [ -z "$CONSOLE_UNICODEMAP" ] || set_sysconfig_option CONSOLE_UNICODEMAP "$CONSOLE_UNICODEMAP"
-[ -z "$RC_LANG" ] || set_sysconfig_option RC_LANG "$RC_LANG"
-[ -z "$RC_LC_MESSAGES" ] || set_sysconfig_option RC_LC_MESSAGES "$RC_LC_MESSAGES"
+
+# If those are set, locale.conf is ignored - so only set them if necessary (i.e. <= 12 base)
+# bsc#1119420
+[ -f /usr/lib/os-release ] && . /usr/lib/os-release
+[ -f /etc/os-release ] && . /etc/os-release
+if [ -n "$VERSION_ID" ] && [ "${VERSION_ID%%.*}" -le 12 ]; then
+    [ -z "$RC_LANG" ] || set_sysconfig_option RC_LANG "$RC_LANG"
+    [ -z "$RC_LC_MESSAGES" ] || set_sysconfig_option RC_LC_MESSAGES "$RC_LC_MESSAGES"
+fi
+
 [ -z "$KEYTABLE" ] || set_sysconfig_option KEYTABLE "$KEYTABLE"
 [ -z "$COMPOSETABLE" ] || set_sysconfig_option COMPOSETABLE "$COMPOSETABLE"
 
diff --git a/live-langset-data.changes b/live-langset-data.changes
index 82c2291..d4e769d 100644
--- a/live-langset-data.changes
+++ b/live-langset-data.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jan  7 16:19:54 UTC 2019 - Fabian Vogt <fvogt@suse.com>
+
+- Only set RC_LANG and RC_LC_MESSAGES on SLE 12 (bsc#1119420)
+
 -------------------------------------------------------------------
 Thu Nov  8 12:48:15 UTC 2018 - Fabian Vogt <fvogt@suse.com>
 
diff --git a/live-langset-data.spec b/live-langset-data.spec
index 251cfe6..c65b64a 100644
--- a/live-langset-data.spec
+++ b/live-langset-data.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package live-langset-data
 #
-# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed