Potter's small format books have been translated into nearly thirty languages including Greek and Russian. "The Tale of Timmy Tiptoes" was published in the Initial Teaching Alphabet in 1966 and in Dutch as "Het Verhaal van Timmie Tuimelaar" in 1968 under licence to Uitgeverij Ploegsma, Amsterdam. The tale was published in Spanish by Grange Books in 1997, and a German Thesaurus edition intended for German ESL and English GSL students in 2009. The Thesaurus edition was printed in English with translations of difficult or unusual words and expressions located in footnotes. In 1986, MacDonald observed that the Potter books had become a traditional part of childhood in both English-speaking lands and those in which the books had been translated.