diff --git a/common/Makefile.am.inc b/common/Makefile.am.inc
index 7f9af9561..d08b8d12d 100644
--- a/common/Makefile.am.inc
+++ b/common/Makefile.am.inc
@@ -160,6 +160,8 @@ libflatpak_common_la_SOURCES = \
 	common/flatpak-json-oci.c \
 	common/flatpak-json-private.h \
 	common/flatpak-json.c \
+	common/flatpak-locale-utils-private.h \
+	common/flatpak-locale-utils.c \
 	common/flatpak-metadata-private.h \
 	common/flatpak-oci-registry-private.h \
 	common/flatpak-oci-registry.c \
diff --git a/common/flatpak-dir-private.h b/common/flatpak-dir-private.h
index 59ae500ac..2f7cf8971 100644
--- a/common/flatpak-dir-private.h
+++ b/common/flatpak-dir-private.h
@@ -1053,20 +1053,4 @@ char **               flatpak_dir_list_unused_refs                          (Fla
                                                                              GCancellable                  *cancellable,
                                                                              GError                       **error);
 
-const GPtrArray *flatpak_get_system_locales (void);
-const GPtrArray *flatpak_get_user_locales (void);
-
-/* Only for regression tests, should not be used directly */
-GDBusProxy *flatpak_locale_get_localed_dbus_proxy (void);
-void flatpak_get_locale_langs_from_localed_dbus (GDBusProxy *proxy,
-                                                 GPtrArray  *langs);
-GDBusProxy *flatpak_locale_get_accounts_dbus_proxy (void);
-gboolean flatpak_get_all_langs_from_accounts_dbus (GDBusProxy *proxy,
-                                                   GPtrArray  *langs);
-void flatpak_get_locale_langs_from_accounts_dbus (GDBusProxy *proxy,
-                                                  GPtrArray  *langs);
-void flatpak_get_locale_langs_from_accounts_dbus_for_user (GDBusProxy *proxy,
-                                                           GPtrArray  *langs,
-                                                           guint uid);
-
 #endif /* __FLATPAK_DIR_H__ */
diff --git a/common/flatpak-dir.c b/common/flatpak-dir.c
index faa086da2..f6a2f872a 100644
--- a/common/flatpak-dir.c
+++ b/common/flatpak-dir.c
@@ -50,6 +50,7 @@
 #include "flatpak-appdata-private.h"
 #include "flatpak-dir-private.h"
 #include "flatpak-error.h"
+#include "flatpak-locale-utils-private.h"
 #include "flatpak-oci-registry-private.h"
 #include "flatpak-ref.h"
 #include "flatpak-run-private.h"
@@ -16096,243 +16097,6 @@ flatpak_dir_get_remote_auto_install_authenticator_ref (FlatpakDir         *self,
   return g_steal_pointer (&ref);
 }
 
-
-GDBusProxy *
-flatpak_locale_get_localed_dbus_proxy (void)
-{
-  const char *localed_bus_name = "org.freedesktop.locale1";
-  const char *localed_object_path = "/org/freedesktop/locale1";
-  const char *localed_interface_name = localed_bus_name;
-
-  return g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
-                                        G_DBUS_PROXY_FLAGS_NONE,
-                                        NULL,
-                                        localed_bus_name,
-                                        localed_object_path,
-                                        localed_interface_name,
-                                        NULL,
-                                        NULL);
-}
-
-void
-flatpak_get_locale_langs_from_localed_dbus (GDBusProxy *proxy, GPtrArray *langs)
-{
-  g_autoptr(GVariant) locale_variant = NULL;
-  g_autofree const gchar **strv = NULL;
-  gsize i, j;
-
-  locale_variant = g_dbus_proxy_get_cached_property (proxy, "Locale");
-  if (locale_variant == NULL)
-    return;
-
-  strv = g_variant_get_strv (locale_variant, NULL);
-
-  for (i = 0; strv[i]; i++)
-    {
-      const gchar *locale = NULL;
-      g_autofree char *lang = NULL;
-
-      const char * const *categories = flatpak_get_locale_categories ();
-
-      for (j = 0; categories[j]; j++)
-        {
-          g_autofree char *prefix = g_strdup_printf ("%s=", categories[j]);
-          if (g_str_has_prefix (strv[i], prefix))
-            {
-              locale = strv[i] + strlen (prefix);
-              break;
-            }
-        }
-
-      if (locale == NULL || strcmp (locale, "") == 0)
-        continue;
-
-      lang = flatpak_get_lang_from_locale (locale);
-      if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-        g_ptr_array_add (langs, g_steal_pointer (&lang));
-    }
-}
-
-GDBusProxy *
-flatpak_locale_get_accounts_dbus_proxy (void)
-{
-  const char *accounts_bus_name = "org.freedesktop.Accounts";
-  const char *accounts_object_path = "/org/freedesktop/Accounts";
-  const char *accounts_interface_name = accounts_bus_name;
-
-  return g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
-                                        G_DBUS_PROXY_FLAGS_NONE,
-                                        NULL,
-                                        accounts_bus_name,
-                                        accounts_object_path,
-                                        accounts_interface_name,
-                                        NULL,
-                                        NULL);
-}
-
-gboolean
-flatpak_get_all_langs_from_accounts_dbus (GDBusProxy *proxy, GPtrArray *langs)
-{
-  g_auto(GStrv) all_langs = NULL;
-  int i;
-  g_autoptr(GVariant) ret = NULL;
-  g_autoptr(GError) error = NULL;
-
-  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
-                                "GetUsersLanguages",
-                                g_variant_new ("()"),
-                                G_DBUS_CALL_FLAGS_NONE,
-                                -1,
-                                NULL,
-                                &error);
-  if (!ret)
-    {
-      g_debug ("Failed to get languages for all users: %s", error->message);
-      return FALSE;
-    }
-
-  g_variant_get (ret,
-                 "(^as)",
-                 &all_langs);
-
-  if (all_langs != NULL)
-    {
-      for (i = 0; all_langs[i] != NULL; i++)
-        {
-          g_autofree char *lang = NULL;
-            lang = flatpak_get_lang_from_locale (all_langs[i]);
-            if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-              g_ptr_array_add (langs, g_steal_pointer (&lang));
-        }
-    }
-
-  return TRUE;
-}
-
-void
-flatpak_get_locale_langs_from_accounts_dbus (GDBusProxy *proxy, GPtrArray *langs)
-{
-  const char *accounts_bus_name = "org.freedesktop.Accounts";
-  const char *accounts_interface_name = "org.freedesktop.Accounts.User";
-  g_auto(GStrv) object_paths = NULL;
-  int i;
-  g_autoptr(GVariant) ret = NULL;
-
-  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
-                                "ListCachedUsers",
-                                g_variant_new ("()"),
-                                G_DBUS_CALL_FLAGS_NONE,
-                                -1,
-                                NULL,
-                                NULL);
-  if (ret != NULL)
-    g_variant_get (ret,
-                   "(^ao)",
-                   &object_paths);
-
-  if (object_paths != NULL)
-    {
-      for (i = 0; object_paths[i] != NULL; i++)
-        {
-          g_autoptr(GDBusProxy) accounts_proxy = NULL;
-          g_autoptr(GVariant) value = NULL;
-
-          accounts_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
-                                                          G_DBUS_PROXY_FLAGS_NONE,
-                                                          NULL,
-                                                          accounts_bus_name,
-                                                          object_paths[i],
-                                                          accounts_interface_name,
-                                                          NULL,
-                                                          NULL);
-
-          if (accounts_proxy)
-            {
-              value = g_dbus_proxy_get_cached_property (accounts_proxy, "Language");
-              if (value != NULL)
-                {
-                  const char *locale = g_variant_get_string (value, NULL);
-                  g_autofree char *lang = NULL;
-
-                  if (strcmp (locale, "") == 0)
-                    continue; /* This user wants the system default locale */
-
-                  lang = flatpak_get_lang_from_locale (locale);
-                  if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-                    g_ptr_array_add (langs, g_steal_pointer (&lang));
-                }
-            }
-        }
-    }
-}
-
-void
-flatpak_get_locale_langs_from_accounts_dbus_for_user (GDBusProxy *proxy, GPtrArray *langs, guint uid)
-{
-  const char *accounts_bus_name = "org.freedesktop.Accounts";
-  const char *accounts_interface_name = "org.freedesktop.Accounts.User";
-  g_autofree char *object_path = NULL;
-  g_autoptr(GVariant) ret = NULL;
-
-  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
-                                "FindUserById",
-                                g_variant_new ("(x)", uid),
-                                G_DBUS_CALL_FLAGS_NONE,
-                                -1,
-                                NULL,
-                                NULL);
-  if (ret != NULL)
-    g_variant_get (ret, "(o)", &object_path);
-
-  if (object_path != NULL)
-    {
-      g_autoptr(GDBusProxy) accounts_proxy = NULL;
-      g_autoptr(GVariant) value = NULL;
-
-      accounts_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
-                                                      G_DBUS_PROXY_FLAGS_NONE,
-                                                      NULL,
-                                                      accounts_bus_name,
-                                                      object_path,
-                                                      accounts_interface_name,
-                                                      NULL,
-                                                      NULL);
-      if (!accounts_proxy)
-        return;
-
-      value = g_dbus_proxy_get_cached_property (accounts_proxy, "Languages");
-      if (value != NULL)
-        {
-          const char **locales = g_variant_get_strv (value, NULL);
-          guint i;
-
-          for (i = 0; locales != NULL && locales[i] != NULL; i++)
-            {
-              g_autofree char *lang = NULL;
-              lang = flatpak_get_lang_from_locale (locales[i]);
-              if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-                g_ptr_array_add (langs, g_steal_pointer (&lang));
-            }
-        }
-      else
-        {
-          value = g_dbus_proxy_get_cached_property (accounts_proxy, "Language");
-          if (value != NULL)
-            {
-              const char *locale = g_variant_get_string (value, NULL);
-              g_autofree char *lang = NULL;
-
-              if (strcmp (locale, "") != 0)
-                {
-                  lang = flatpak_get_lang_from_locale (locale);
-                  if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-                    g_ptr_array_add (langs, g_steal_pointer (&lang));
-                }
-            }
-        }
-    }
-}
-
 static int
 cmpstringp (const void *p1, const void *p2)
 {
@@ -16363,65 +16127,6 @@ flatpak_dir_get_config_strv (FlatpakDir *self, char *key)
   return NULL;
 }
 
-const GPtrArray *
-flatpak_get_system_locales (void)
-{
-  static GPtrArray *cached = NULL;
-
-  if (g_once_init_enter (&cached))
-    {
-      GPtrArray *langs = g_ptr_array_new_with_free_func (g_free);
-      g_autoptr(GDBusProxy) accounts_proxy = NULL;
-
-      accounts_proxy = flatpak_locale_get_accounts_dbus_proxy ();
-
-      if (accounts_proxy == NULL
-          || !flatpak_get_all_langs_from_accounts_dbus (accounts_proxy, langs))
-        {
-          g_autoptr(GDBusProxy) localed_proxy = NULL;
-
-          /* Get the system default locales */
-          localed_proxy = flatpak_locale_get_localed_dbus_proxy ();
-          if (localed_proxy != NULL)
-            flatpak_get_locale_langs_from_localed_dbus (localed_proxy, langs);
-
-          /* Now add the user account locales from AccountsService. If accounts_proxy is
-           * not NULL, it means that AccountsService exists */
-          if (accounts_proxy != NULL)
-            flatpak_get_locale_langs_from_accounts_dbus (accounts_proxy, langs);
-        }
-
-      g_ptr_array_add (langs, NULL);
-
-      g_once_init_leave (&cached, langs);
-    }
-
-  return (const GPtrArray *)cached;
-}
-
-const GPtrArray *
-flatpak_get_user_locales (void)
-{
-  static GPtrArray *cached = NULL;
-
-  if (g_once_init_enter (&cached))
-    {
-      GPtrArray *langs = g_ptr_array_new_with_free_func (g_free);
-      g_autoptr(GDBusProxy) accounts_proxy = NULL;
-
-      accounts_proxy = flatpak_locale_get_accounts_dbus_proxy ();
-
-      if (accounts_proxy != NULL)
-        flatpak_get_locale_langs_from_accounts_dbus_for_user (accounts_proxy, langs, getuid ());
-
-      g_ptr_array_add (langs, NULL);
-
-      g_once_init_leave (&cached, langs);
-    }
-
-  return (const GPtrArray *)cached;
-}
-
 char **
 flatpak_dir_get_default_locales (FlatpakDir *self)
 {
diff --git a/common/flatpak-locale-utils-private.h b/common/flatpak-locale-utils-private.h
new file mode 100644
index 000000000..0519d209c
--- /dev/null
+++ b/common/flatpak-locale-utils-private.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2014 Red Hat, Inc
+ * Copyright © 2023 Collabora Ltd.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Alexander Larsson <alexl@redhat.com>
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+
+const char * const *flatpak_get_locale_categories (void);
+char *flatpak_get_lang_from_locale (const char *locale);
+char **flatpak_get_current_locale_langs (void);
+const GPtrArray *flatpak_get_system_locales (void);
+const GPtrArray *flatpak_get_user_locales (void);
+
+/* Only for regression tests, should not be used directly */
+GDBusProxy *flatpak_locale_get_localed_dbus_proxy (void);
+void flatpak_get_locale_langs_from_localed_dbus (GDBusProxy *proxy,
+                                                 GPtrArray  *langs);
+GDBusProxy *flatpak_locale_get_accounts_dbus_proxy (void);
+gboolean flatpak_get_all_langs_from_accounts_dbus (GDBusProxy *proxy,
+                                                   GPtrArray  *langs);
+void flatpak_get_locale_langs_from_accounts_dbus (GDBusProxy *proxy,
+                                                  GPtrArray  *langs);
+void flatpak_get_locale_langs_from_accounts_dbus_for_user (GDBusProxy *proxy,
+                                                           GPtrArray  *langs,
+                                                           guint uid);
diff --git a/common/flatpak-locale-utils.c b/common/flatpak-locale-utils.c
new file mode 100644
index 000000000..859721bc2
--- /dev/null
+++ b/common/flatpak-locale-utils.c
@@ -0,0 +1,388 @@
+/* vi:set et sw=2 sts=2 cin cino=t0,f0,(0,{s,>2s,n-s,^-s,e-s:
+ * Copyright © 2014-2019 Red Hat, Inc
+ * Copyright © 2017 Endless Mobile, Inc.
+ * Copyright © 2023 Collabora Ltd.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Alexander Larsson <alexl@redhat.com>
+ *       Philip Withnall <withnall@endlessm.com>
+ *       Matthew Leeds <matthew.leeds@endlessm.com>
+ */
+
+#include "config.h"
+#include "flatpak-locale-utils-private.h"
+
+#include <glib.h>
+#include "libglnx.h"
+
+#include "flatpak-utils-private.h"
+
+const char * const *
+flatpak_get_locale_categories (void)
+{
+  /* See locale(7) for these categories */
+  static const char * const categories[] = {
+    "LANG", "LC_ALL", "LC_MESSAGES", "LC_ADDRESS", "LC_COLLATE", "LC_CTYPE",
+    "LC_IDENTIFICATION", "LC_MONETARY", "LC_MEASUREMENT", "LC_NAME", "LC_NUMERIC",
+    "LC_PAPER", "LC_TELEPHONE", "LC_TIME",
+    NULL
+  };
+
+  return categories;
+}
+
+char *
+flatpak_get_lang_from_locale (const char *locale)
+{
+  g_autofree char *lang = g_strdup (locale);
+  char *c;
+
+  c = strchr (lang, '@');
+  if (c != NULL)
+    *c = 0;
+  c = strchr (lang, '_');
+  if (c != NULL)
+    *c = 0;
+  c = strchr (lang, '.');
+  if (c != NULL)
+    *c = 0;
+
+  if (strcmp (lang, "C") == 0)
+    return NULL;
+
+  return g_steal_pointer (&lang);
+}
+
+char **
+flatpak_get_current_locale_langs (void)
+{
+  const char * const *categories = flatpak_get_locale_categories ();
+  GPtrArray *langs = g_ptr_array_new ();
+  int i;
+
+  for (; categories != NULL && *categories != NULL; categories++)
+    {
+      const gchar * const *locales = g_get_language_names_with_category (*categories);
+
+      for (i = 0; locales[i] != NULL; i++)
+        {
+          g_autofree char *lang = flatpak_get_lang_from_locale (locales[i]);
+          if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+            g_ptr_array_add (langs, g_steal_pointer (&lang));
+        }
+    }
+
+  g_ptr_array_sort (langs, flatpak_strcmp0_ptr);
+  g_ptr_array_add (langs, NULL);
+
+  return (char **) g_ptr_array_free (langs, FALSE);
+}
+
+GDBusProxy *
+flatpak_locale_get_localed_dbus_proxy (void)
+{
+  const char *localed_bus_name = "org.freedesktop.locale1";
+  const char *localed_object_path = "/org/freedesktop/locale1";
+  const char *localed_interface_name = localed_bus_name;
+
+  return g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                        G_DBUS_PROXY_FLAGS_NONE,
+                                        NULL,
+                                        localed_bus_name,
+                                        localed_object_path,
+                                        localed_interface_name,
+                                        NULL,
+                                        NULL);
+}
+
+void
+flatpak_get_locale_langs_from_localed_dbus (GDBusProxy *proxy, GPtrArray *langs)
+{
+  g_autoptr(GVariant) locale_variant = NULL;
+  g_autofree const gchar **strv = NULL;
+  gsize i, j;
+
+  locale_variant = g_dbus_proxy_get_cached_property (proxy, "Locale");
+  if (locale_variant == NULL)
+    return;
+
+  strv = g_variant_get_strv (locale_variant, NULL);
+
+  for (i = 0; strv[i]; i++)
+    {
+      const gchar *locale = NULL;
+      g_autofree char *lang = NULL;
+
+      const char * const *categories = flatpak_get_locale_categories ();
+
+      for (j = 0; categories[j]; j++)
+        {
+          g_autofree char *prefix = g_strdup_printf ("%s=", categories[j]);
+          if (g_str_has_prefix (strv[i], prefix))
+            {
+              locale = strv[i] + strlen (prefix);
+              break;
+            }
+        }
+
+      if (locale == NULL || strcmp (locale, "") == 0)
+        continue;
+
+      lang = flatpak_get_lang_from_locale (locale);
+      if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+        g_ptr_array_add (langs, g_steal_pointer (&lang));
+    }
+}
+
+GDBusProxy *
+flatpak_locale_get_accounts_dbus_proxy (void)
+{
+  const char *accounts_bus_name = "org.freedesktop.Accounts";
+  const char *accounts_object_path = "/org/freedesktop/Accounts";
+  const char *accounts_interface_name = accounts_bus_name;
+
+  return g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                        G_DBUS_PROXY_FLAGS_NONE,
+                                        NULL,
+                                        accounts_bus_name,
+                                        accounts_object_path,
+                                        accounts_interface_name,
+                                        NULL,
+                                        NULL);
+}
+
+gboolean
+flatpak_get_all_langs_from_accounts_dbus (GDBusProxy *proxy, GPtrArray *langs)
+{
+  g_auto(GStrv) all_langs = NULL;
+  int i;
+  g_autoptr(GVariant) ret = NULL;
+  g_autoptr(GError) error = NULL;
+
+  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
+                                "GetUsersLanguages",
+                                g_variant_new ("()"),
+                                G_DBUS_CALL_FLAGS_NONE,
+                                -1,
+                                NULL,
+                                &error);
+  if (!ret)
+    {
+      g_debug ("Failed to get languages for all users: %s", error->message);
+      return FALSE;
+    }
+
+  g_variant_get (ret,
+                 "(^as)",
+                 &all_langs);
+
+  if (all_langs != NULL)
+    {
+      for (i = 0; all_langs[i] != NULL; i++)
+        {
+          g_autofree char *lang = NULL;
+            lang = flatpak_get_lang_from_locale (all_langs[i]);
+            if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+              g_ptr_array_add (langs, g_steal_pointer (&lang));
+        }
+    }
+
+  return TRUE;
+}
+
+void
+flatpak_get_locale_langs_from_accounts_dbus (GDBusProxy *proxy, GPtrArray *langs)
+{
+  const char *accounts_bus_name = "org.freedesktop.Accounts";
+  const char *accounts_interface_name = "org.freedesktop.Accounts.User";
+  g_auto(GStrv) object_paths = NULL;
+  int i;
+  g_autoptr(GVariant) ret = NULL;
+
+  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
+                                "ListCachedUsers",
+                                g_variant_new ("()"),
+                                G_DBUS_CALL_FLAGS_NONE,
+                                -1,
+                                NULL,
+                                NULL);
+  if (ret != NULL)
+    g_variant_get (ret,
+                   "(^ao)",
+                   &object_paths);
+
+  if (object_paths != NULL)
+    {
+      for (i = 0; object_paths[i] != NULL; i++)
+        {
+          g_autoptr(GDBusProxy) accounts_proxy = NULL;
+          g_autoptr(GVariant) value = NULL;
+
+          accounts_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                                          G_DBUS_PROXY_FLAGS_NONE,
+                                                          NULL,
+                                                          accounts_bus_name,
+                                                          object_paths[i],
+                                                          accounts_interface_name,
+                                                          NULL,
+                                                          NULL);
+
+          if (accounts_proxy)
+            {
+              value = g_dbus_proxy_get_cached_property (accounts_proxy, "Language");
+              if (value != NULL)
+                {
+                  const char *locale = g_variant_get_string (value, NULL);
+                  g_autofree char *lang = NULL;
+
+                  if (strcmp (locale, "") == 0)
+                    continue; /* This user wants the system default locale */
+
+                  lang = flatpak_get_lang_from_locale (locale);
+                  if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+                    g_ptr_array_add (langs, g_steal_pointer (&lang));
+                }
+            }
+        }
+    }
+}
+
+void
+flatpak_get_locale_langs_from_accounts_dbus_for_user (GDBusProxy *proxy, GPtrArray *langs, guint uid)
+{
+  const char *accounts_bus_name = "org.freedesktop.Accounts";
+  const char *accounts_interface_name = "org.freedesktop.Accounts.User";
+  g_autofree char *object_path = NULL;
+  g_autoptr(GVariant) ret = NULL;
+
+  ret = g_dbus_proxy_call_sync (G_DBUS_PROXY (proxy),
+                                "FindUserById",
+                                g_variant_new ("(x)", uid),
+                                G_DBUS_CALL_FLAGS_NONE,
+                                -1,
+                                NULL,
+                                NULL);
+  if (ret != NULL)
+    g_variant_get (ret, "(o)", &object_path);
+
+  if (object_path != NULL)
+    {
+      g_autoptr(GDBusProxy) accounts_proxy = NULL;
+      g_autoptr(GVariant) value = NULL;
+
+      accounts_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
+                                                      G_DBUS_PROXY_FLAGS_NONE,
+                                                      NULL,
+                                                      accounts_bus_name,
+                                                      object_path,
+                                                      accounts_interface_name,
+                                                      NULL,
+                                                      NULL);
+      if (!accounts_proxy)
+        return;
+
+      value = g_dbus_proxy_get_cached_property (accounts_proxy, "Languages");
+      if (value != NULL)
+        {
+          const char **locales = g_variant_get_strv (value, NULL);
+          guint i;
+
+          for (i = 0; locales != NULL && locales[i] != NULL; i++)
+            {
+              g_autofree char *lang = NULL;
+              lang = flatpak_get_lang_from_locale (locales[i]);
+              if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+                g_ptr_array_add (langs, g_steal_pointer (&lang));
+            }
+        }
+      else
+        {
+          value = g_dbus_proxy_get_cached_property (accounts_proxy, "Language");
+          if (value != NULL)
+            {
+              const char *locale = g_variant_get_string (value, NULL);
+              g_autofree char *lang = NULL;
+
+              if (strcmp (locale, "") != 0)
+                {
+                  lang = flatpak_get_lang_from_locale (locale);
+                  if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
+                    g_ptr_array_add (langs, g_steal_pointer (&lang));
+                }
+            }
+        }
+    }
+}
+
+const GPtrArray *
+flatpak_get_system_locales (void)
+{
+  static GPtrArray *cached = NULL;
+
+  if (g_once_init_enter (&cached))
+    {
+      GPtrArray *langs = g_ptr_array_new_with_free_func (g_free);
+      g_autoptr(GDBusProxy) accounts_proxy = NULL;
+
+      accounts_proxy = flatpak_locale_get_accounts_dbus_proxy ();
+
+      if (accounts_proxy == NULL
+          || !flatpak_get_all_langs_from_accounts_dbus (accounts_proxy, langs))
+        {
+          g_autoptr(GDBusProxy) localed_proxy = NULL;
+
+          /* Get the system default locales */
+          localed_proxy = flatpak_locale_get_localed_dbus_proxy ();
+          if (localed_proxy != NULL)
+            flatpak_get_locale_langs_from_localed_dbus (localed_proxy, langs);
+
+          /* Now add the user account locales from AccountsService. If accounts_proxy is
+           * not NULL, it means that AccountsService exists */
+          if (accounts_proxy != NULL)
+            flatpak_get_locale_langs_from_accounts_dbus (accounts_proxy, langs);
+        }
+
+      g_ptr_array_add (langs, NULL);
+
+      g_once_init_leave (&cached, langs);
+    }
+
+  return (const GPtrArray *)cached;
+}
+
+const GPtrArray *
+flatpak_get_user_locales (void)
+{
+  static GPtrArray *cached = NULL;
+
+  if (g_once_init_enter (&cached))
+    {
+      GPtrArray *langs = g_ptr_array_new_with_free_func (g_free);
+      g_autoptr(GDBusProxy) accounts_proxy = NULL;
+
+      accounts_proxy = flatpak_locale_get_accounts_dbus_proxy ();
+
+      if (accounts_proxy != NULL)
+        flatpak_get_locale_langs_from_accounts_dbus_for_user (accounts_proxy, langs, getuid ());
+
+      g_ptr_array_add (langs, NULL);
+
+      g_once_init_leave (&cached, langs);
+    }
+
+  return (const GPtrArray *)cached;
+}
diff --git a/common/flatpak-utils-private.h b/common/flatpak-utils-private.h
index 6187c48a0..b9a68cdae 100644
--- a/common/flatpak-utils-private.h
+++ b/common/flatpak-utils-private.h
@@ -107,10 +107,6 @@ char **flatpak_strv_merge (char   **strv1,
 char **flatpak_subpaths_merge (char **subpaths1,
                                char **subpaths2);
 
-const char * const *flatpak_get_locale_categories (void);
-char *flatpak_get_lang_from_locale (const char *locale);
-char **flatpak_get_current_locale_langs (void);
-
 GBytes * flatpak_read_stream (GInputStream * in,
                               gboolean null_terminate,
                               GError      **error);
diff --git a/common/flatpak-utils.c b/common/flatpak-utils.c
index 7c2c60f2c..be9f1d462 100644
--- a/common/flatpak-utils.c
+++ b/common/flatpak-utils.c
@@ -7401,42 +7401,6 @@ flatpak_subpaths_merge (char **subpaths1,
   return res;
 }
 
-const char * const *
-flatpak_get_locale_categories (void)
-{
-  /* See locale(7) for these categories */
-  static const char * const categories[] = {
-    "LANG", "LC_ALL", "LC_MESSAGES", "LC_ADDRESS", "LC_COLLATE", "LC_CTYPE",
-    "LC_IDENTIFICATION", "LC_MONETARY", "LC_MEASUREMENT", "LC_NAME", "LC_NUMERIC",
-    "LC_PAPER", "LC_TELEPHONE", "LC_TIME",
-    NULL
-  };
-
-  return categories;
-}
-
-char *
-flatpak_get_lang_from_locale (const char *locale)
-{
-  g_autofree char *lang = g_strdup (locale);
-  char *c;
-
-  c = strchr (lang, '@');
-  if (c != NULL)
-    *c = 0;
-  c = strchr (lang, '_');
-  if (c != NULL)
-    *c = 0;
-  c = strchr (lang, '.');
-  if (c != NULL)
-    *c = 0;
-
-  if (strcmp (lang, "C") == 0)
-    return NULL;
-
-  return g_steal_pointer (&lang);
-}
-
 gboolean
 flatpak_g_ptr_array_contains_string (GPtrArray *array, const char *str)
 {
@@ -7450,31 +7414,6 @@ flatpak_g_ptr_array_contains_string (GPtrArray *array, const char *str)
   return FALSE;
 }
 
-char **
-flatpak_get_current_locale_langs (void)
-{
-  const char * const *categories = flatpak_get_locale_categories ();
-  GPtrArray *langs = g_ptr_array_new ();
-  int i;
-
-  for (; categories != NULL && *categories != NULL; categories++)
-    {
-      const gchar * const *locales = g_get_language_names_with_category (*categories);
-
-      for (i = 0; locales[i] != NULL; i++)
-        {
-          g_autofree char *lang = flatpak_get_lang_from_locale (locales[i]);
-          if (lang != NULL && !flatpak_g_ptr_array_contains_string (langs, lang))
-            g_ptr_array_add (langs, g_steal_pointer (&lang));
-        }
-    }
-
-  g_ptr_array_sort (langs, flatpak_strcmp0_ptr);
-  g_ptr_array_add (langs, NULL);
-
-  return (char **) g_ptr_array_free (langs, FALSE);
-}
-
 void
 flatpak_log_dir_access (FlatpakDir *dir)
 {
diff --git a/common/meson.build b/common/meson.build
index 18f0249a6..0dc07d288 100644
--- a/common/meson.build
+++ b/common/meson.build
@@ -176,6 +176,7 @@ sources = [
   'flatpak-instance.c',
   'flatpak-json-oci.c',
   'flatpak-json.c',
+  'flatpak-locale-utils.c',
   'flatpak-oci-registry.c',
   'flatpak-portal-error.c',
   'flatpak-progress.c',
diff --git a/tests/test-locale-utils.c b/tests/test-locale-utils.c
index 8fe92fd70..38e708794 100644
--- a/tests/test-locale-utils.c
+++ b/tests/test-locale-utils.c
@@ -9,7 +9,7 @@
 #include "libglnx.h"
 #include "flatpak.h"
 
-#include "flatpak-utils-private.h"
+#include "flatpak-locale-utils-private.h"
 
 #include "tests/testlib.h"