On Tue, Jan 26 2016, Richard Stallman wrote:

> Would someone please implement this?

Here is my shot at this.  Load the attached file and start the browser
with "M-x ubb-browse". That displays the characters of the "Basic Latin"
block.  From there it's probably the easiest to use the menu to explore
the available commands.

I defined a sets of characters for some languages by looking at
Wikipedia.  This would obviously need more work by people who are
familiar with those languages.

The file is also available at: https://github.com/ellerh/ubb

Helmut