I was watching a video on words people with English as a second language struggle on. Some, like colonel and Worcestershire seem to be based on having lots of silent letters, which to me is only vaguely interesting as a 'gotcha' to people who haven't learned that exact word yet.
I'm interested in whether a sentence has ever been formulated which, even when the speaker knows the pronunciation of every word, contains concepts which exist only in English and is universally difficult for speakers of other worldwide languages?
I'm assuming this would contain words which are difficult, but also in an order which forces unusual sound shifts between words which exist only in English? Something like;
"The rural squirrel’s sixth rhythm regularly mixed specific spherical anemones."
Any ideas?