Let's get back to the question Nick originally asked before we got sidetracked down the road of Latin or otherwise. A road I might add that we seem to have traveled here so often it will soon need resurfacing
Latin may, or may not, be an route to integration, but the question was broader than that.
Nick Baty wrote: Are there any parishes out there who are successfully providing music in a variety of languages and styles? And, given the endless threads on here about encouraging congregations to sing, are there any parishes whose singing has improved following the integration of other nationalities and cultures.