[gtk/wip/chergert/spellcheck] spellcheck: add series of fallbacks when loading default

[Christian Hergert <chergert src gnome org>]

commit 04a8f6845f7046ec1f4959c99b947deb7e714e26
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 15 15:06:30 2021 -0700

    spellcheck: add series of fallbacks when loading default

 gtk/gtkspellcheck.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkspellcheck.c b/gtk/gtkspellcheck.c
index fc64454dd4..cfbf49d5d2 100644
--- a/gtk/gtkspellcheck.c
+++ b/gtk/gtkspellcheck.c
@@ -377,7 +377,17 @@ gtk_spell_checker_get_default (void)
 
   if (instance == NULL)
     {
-      instance = gtk_spell_checker_new_for_language ("en_US");
+      const char * const *langs = g_get_language_names ();
+
+      if (langs != NULL)
+        instance = gtk_spell_checker_new_for_languages (langs);
+
+      if (instance == NULL)
+        instance = gtk_spell_checker_new_for_language ("en_US");
+
+      if (instance == NULL)
+        instance = gtk_spell_checker_new_for_language ("C");
+
       g_object_add_weak_pointer (G_OBJECT (instance), (gpointer *)&instance);
     }