I lived in Sweden for a while, Swedes are very proficient in English. Yet, they almost always pronounce ch as sh. They even have TV ads that make fun of this.
"Mayday! ... We're sinking! We're sinking!"
"What are you sinking about?"
While on pronounciation topics, how does one pronounce "Knuth"? Is the k silent like in "know"?
Edit: According to Wikipedia it is kə-NOOTH.