Adding an option/range to languages/start window

Is there a way to add a script or Unicode range to the languages part of the sidebar and/or the start window? I’d like to have Cherokee (13A0-13FD) and Canadian Syllabics (1400-16F7) there.

Would this do it?

Thanks Craig. I’ll fiddle with that and see.

I added it to Glyphs. Will be in the next update.

Much appreciated, Georg.