diff -ur kde-workspace-4.11.15/kdm/backend/client.c kde-workspace-4.11.15.new/kdm/backend/client.c
--- kde-workspace-4.11.15/kdm/backend/client.c	2015-01-06 14:37:25.000000000 +0300
+++ kde-workspace-4.11.15.new/kdm/backend/client.c	2015-03-17 18:49:06.658624504 +0300
@@ -1035,6 +1035,20 @@
 
 static const char *envvars[] = {
     "TZ", /* SYSV and SVR4, but never hurts */
+    "LANG", /* Locale-related variables that can be defined for the system */
+    "LANGUAGE",
+    "LC_CTYPE",
+    "LC_NUMERIC",
+    "LC_TIME",
+    "LC_COLLATE",
+    "LC_MONETARY",
+    "LC_MESSAGES",
+    "LC_PAPER",
+    "LC_NAME",
+    "LC_ADDRESS",
+    "LC_TELEPHONE",
+    "LC_MEASUREMENT",
+    "LC_IDENTIFICATION",
 #ifdef _AIX
     "AUTHSTATE", /* for kerberos */
 #endif