Comment 5 for bug 13346

(In reply to comment #4)
I don't have any news from Japanese linux users, but you are right about (a). I
think that the reason this hidden attribute was introduced in the first place
was to allow the Japanese to automatically have the two layouts simply by
choosing the "japanese" layout. But this approach loses its interest when having
multiple layouts. So in my opinion the best option would be (b).

Is there a Japanese Ubuntu Community?