A Russian one (slightly NSFW)
In fact it's not a joke, it's what we call 'baika' here, a funny story from someone's life. So here it goes
A company of friends goes to Finnland. They move into a cottage village and one of them has to take a shit after this really long way 'train - ferryboat - bus'. And it turns out to be a big-big shit. He presses the button to flush and the thing doesn't work.
So the guy realizes he doesn't speak Finnish and chambermaids presumably don't speak Russian. But Sā¦