When I worked as lawyer for the schools in Argyll and the inner western islands (Mull, Islay, Tiree etc.) in the 1980's the locals would often speak to one another in Scots Gaelic when they didn't want me to know what they were saying. Gaelic was often spoken in Oban where I was based at the time. I dabbled with trying to learn a few words and phrases. I recall a visit to one of the rural primary schools where the teacher had helpfully got the kids to label everything in the classroom in Gaelic (door. window, desk, chair, blackboard etc.) prior to my visit. As McClef said there are bilingual railway station signs in Glasgow and Edinburgh as well as on the Highland and West Highland lines.