We've not had any complaints about other languages being spoken in the office, and it's normal to hear lots of languages being spoken, which I like. Although English is the working language, people as likely to be speaking to customers in the cutomer's language, so I can't imagine they're going to insist on everyone speaking English at all times.
There is racism, though. Years ago, I saw a manager sifting through CVs and discarding names he didn't recognise as properly English, because he wouldn't understand what they say - it wouldn't happen now in that recruitment is now all online, so while they might still reject people for these reasons, it's less likely to be witnessed as with a physical pile of papers, though they might still comment on it, I guess.
Some departments round the organisation are very white, whereas others are much more diverse, and I suspect that is probably down to unconscious bias. (Or maybe conscious bias in one or two cases.) I've also seen anti- German bias, which puzzles me, because if you don't want to work with people from other countries, why did you get a job at the EMEA HQ of a multinational company?
I did report a colleague for using the n-word. I am still a little bitter that he just got told not to do it again, while at the time, I was going through a wrongful disciplinary, which I suspect was as much to do with putting the only woman in her place as anything. But of course, there's no sexism, said manager, when I had given a list of minor examples of how things have a cumulative effect. I expect he thinks any incidents of racism are also people being over-sensitive, too. Having said that, overall, I think we are probably a better organisation to work for in terms of diversity then many others, and as we are far from perfect, I think it must be really depressing with some employers. And there are definitely some departments better than others.