On GTK+ you can now control whether
capi:output-pane
and
capi:editor-pane
use the native input method to interpret keyboard input.
See the new initarg
:use-native-input-method
which controls this per instance, and also the function
capi:set-default-use-native-input-method
which controls the default behavior.
LispWorks Release Notes and Installation Guide - 23 Dec 2011