Comment 4 for bug 1610492

Settings tool indicator would be shown in wnigpanel
You can set your input key board combination to your favorite there (ex: ctrl + space)
Or try these command

1)nimf
$ nimf-settings

2) uim
$ uim-pref-gtk

And if they works fine in slingshot.
Then go to this report and press this bug affect me button please.
After the check I would ask confirm it and would mark it as duplicate of that report.
https://bugs.launchpad.net/slingshot/+bug/1604498