[hsivonen]

As a matter of usage and severity of failure mode, East Asian languages are very much the main concern. Japanese specifically is the primary motivator for keeping the feature in any form.

If there's more elaborate UI surface in order to address Latin-script cases where autodetection fails (I estimate 1% failure rate for Polish), it risks getting the whole thing removed completely even for Japanese users (as happened with the hamburger menu entry point in Firefox when the hamburger menu was rewritten, as happened in Chrome previously, and as happened with Safari for iOS in the sense of the menu never making it to iOS).