Tell gettext that we want to have the messages in the UTF-8 encoding, to

avoid the extra conversion that gettext would otherwise perform (from the
message encoding which is UTF-8 to the current locale encoding).

WPrefs.app/main.c

@@ -138,6 +138,7 @@ main(int argc, char **argv)
         bindtextdomain("WPrefs", getenv("NLSPATH"));
     else
         bindtextdomain("WPrefs", LOCALEDIR);
+    bind_textdomain_codeset("WPrefs", "UTF-8");
     textdomain("WPrefs");
 
     if (!XSupportsLocale()) {