=== modified file 'share/extensions/inkex.py'
--- share/extensions/inkex.py	2016-05-26 09:28:23 +0000
+++ share/extensions/inkex.py	2017-02-21 13:09:57 +0000
@@ -54,7 +54,10 @@
     if sys.platform.startswith('win'):
         import locale
         current_locale, encoding = locale.getdefaultlocale()
-        os.environ['LANG'] = current_locale
+        # Disable setting LANG to avoid crashes of second instances
+        # launched from extensions. See bug 1663697, bug 1666314 for
+        # details.
+        # os.environ['LANG'] = current_locale
         try:
             localdir = os.environ['INKSCAPE_LOCALEDIR']
             trans = gettext.translation(domain, localdir, [current_locale], fallback=True)