Last weekend I went to see a friend in Newcastle, and while we were exploring the place, I was listening out for languages other than English. The only ones I heard were Mandarin and Spanish, and my friend and I spoken mainly in English and Welsh, with a bit of Czech thrown in for variety.
While I was there we saw The Revenant, which includes dialogue in English, French and Arikara, a Caddoan language closely related to Pawnee, and spoken by a handful of people in North Dakota.
I’m sure other languages are spoken in Newcastle, as it’s a relatively large city with a number of universities and plenty of foreign students, but maybe we were in the wrong parts to hear much foreign talk.
I also heard plenty of Geordie, the local dialect, and didn’t get some of the things people said to me first time, so had to ask them to repeat themselves. It differs from standard English in various ways, and if you’re not used to it can sound almost like a different language.
Are there any regional accents / dialects in your country that you have trouble understanding?