The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary.
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Notes from Wikiquote
(This observation is extensively quoted even outside of Usenet, and has appeared in textbooks. It has also been misattributed, in part and in whole, to Booker T. Washington, to Ambrose Bierce, to Terry Pratchett, and, in one case, to the painter James Nicoll (1846–1918).)