If you are a logophile (lover of words) then the English language is a treasure trove as it has the most words of any language. English borrows from so many other languages that it is a panoply of sounds and spellings.
Here is a fun list of 15-not-so-common words that I was introduced to by a Toastmasters colleague of mine. If you could be impavid with your use of them I am sure that your duende would multiply greatly. Or at the very least you might get a date with a fellow logophile! Thanks Peter for the tip!