I couldn't give a toss about their ethnicity, gender, sexual orientation, hair colour or whatever, but I would like them to be able to speak properly.

With speech, there is no proper - only an irksome prejudice that elects to somehow superior in order to justify the sort of discrimination as celebrated above. So that's the disabled, the spastics, the hare-lipped, the deaf, the stoke victims, the stammerers (&c.) out the window then. Nice one, Gervase!