When you’re not looking at it, this sentence is in Spanish.

Douglas R. Hofstadter (b. 1945) American academic, cognitive scientist, author

“Understanding understanding,” Scientific American (Jan 1981)
    (Source)

Frequently misattributed to his most famous book, Gödel, Escher, Bach: An Eternal Golden Braid (1979). Reprinted in his  <i>Metamagical Themas</i>, ch. 1 "On Self-Referential Sentences" (1985).