diff -ru lightdm-1.30.0.orig/debian/changelog lightdm-1.30.0/debian/changelog
--- lightdm-1.30.0.orig/debian/changelog	2019-10-19 00:24:44.000000000 +0200
+++ lightdm-1.30.0/debian/changelog	2020-02-07 12:40:01.766822289 +0100
@@ -1,3 +1,10 @@
+lightdm (1.30.0-0ubuntu3) focal; urgency=medium
+
+  * debian/patches/04_language_handling.patch:
+    - Only set LANGUAGE if not in a live session (LP: #1861481).
+
+ -- Gunnar Hjalmarsson <gunnarhj@ubuntu.com>  Fri, 07 Feb 2020 12:40:00 +0100
+
 lightdm (1.30.0-0ubuntu2) focal; urgency=medium
 
   * Cherry-pick upstream commit dropping Qt 4 support.
diff -ru lightdm-1.30.0.orig/debian/patches/04_language_handling.patch lightdm-1.30.0/debian/patches/04_language_handling.patch
--- lightdm-1.30.0.orig/debian/patches/04_language_handling.patch	2019-08-14 04:18:58.000000000 +0200
+++ lightdm-1.30.0/debian/patches/04_language_handling.patch	2020-02-07 12:37:00.370224978 +0100
@@ -69,12 +69,15 @@
 ===================================================================
 --- lightdm.orig/src/seat.c
 +++ lightdm/src/seat.c
-@@ -987,7 +987,7 @@ configure_session (Session *session, Ses
+@@ -987,7 +987,10 @@ configure_session (Session *session, Se
      }
      if (language && language[0] != '\0')
      {
 -        session_set_env (session, "LANG", language);
-+        session_set_env (session, "LANGUAGE", language);
++        /* Only set LANGUAGE if not in a live session
++           https://launchpad.net/bugs/1861481 */
++        if (system ("df | grep -q ^/cow") != 0)
++            session_set_env (session, "LANGUAGE", language);
          session_set_env (session, "GDM_LANG", language);
      }
  }