Carl Frederick Buechner (born July 11, 1926) is an American writer and theologian.
 He is an ordained Presbyterian minister and the author of more than thirty published books.
 His work encompasses different genres, including fiction, autobiography, essays and sermons, and his career has spanned six decades.
 Buechner's books have been translated into many languages for publication around the world.
 He is best known for his works "A Long Day's Dying" (his first work, published in 1950); "The Book of Bebb", a tetralogy based on the character Leo Bebb published in 1979; "Godric", a first person narrative of the life of the medieval saint, and a finalist for the Pulitzer Prize in 1981; "Brendan", a second novel narrating a saint's life, published in 1987; "Listening to Your Life: Daily Meditations with Frederick Buechner" (1992); and his autobiographical works "The Sacred Journey" (1982), "Now and Then" (1983), "Telling Secrets" (1991), and "The Eyes of the Heart: Memoirs of the Lost and Found" (1999).
 He has been called "Major talent" and "...a very good writer indeed" by "the New York Times", and "one of our most original storytellers" by USA Today.
 Annie Dillard (Pulitzer Prize-winning author of "Pilgrim at Tinker Creek") says: "Frederick Buechner is one of our finest writers."
Yellow Tanabe (田辺イエロウ , Tanabe Ierou , born June 13, 19??
 in Tokyo) is a Japanese manga artist.
 She was an assistant for Mitsuru Adachi and Makoto Raiku and made her debut in 2002 with the short story "Lost Princess".
 She is best known for the manga series "Kekkaishi", which has been adapted as an anime television series and translated into many languages.
 She published a one-shot story in the inaugural issue of the revival of "Monthly Shōnen Sunday" in May 2009.
Hans Maarten van den Brink is a Dutch journalist and writer.
 He was born in 1956 in Oegstgeest.
 He began his career as an art editor at NRC Handelsblad.
 He worked in Spain for a few years as foreign correspondent, which provided material for a couple of his books ("The Thirty Days of Saint Isidore", on bullfighting; and "Spain: Body and Soul").
 He also worked in television.
 He is best known for his novella "On the Water" (1998) which was translated in many languages and won numerous literary prizes.
Ralf König (born 8 August 1960) is one of the best known and most commercially successful German comic book creators. His books have been translated into many languages.
 He has resided in Soest, Dortmund and Berlin and now lives in Cologne.
Margi Preus is an American children's writer.
 She is a 2011 Newbery Honor winner and won the Asian/Pacific American Award for Literature for Heart of a Samurai.
 Her books have won multiple awards, honored as ALA/ALSC Notables, landed on many "best of" lists, featured on NPR, chosen for community reads, and translated into many languages.
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Patty Smith Hill (March 27, 1868 – May 25, 1946) was a composer and teacher who is perhaps best known for co-writing, with her sister Mildred Hill, the tune which later became popular as "Happy Birthday to You".
 She was an American nursery school, kindergarten teacher, and key founder of the National Association for Nursery Education (NANE) which now exists as the National Association For the Education of Young Children (NAEYC).
Linda Crockett (born in Hamilton, Ontario, Canada), is an American author and teacher, best known for her horror, romance, and psychological thrillers.
 Linda Crockett published over a dozen books which were translated into as many languages, under the pen names Linda Crockett, Linda Crockett Gray, Linda C. Gray, and Christina Crockett.
 First published by Playboy Paperbacks in 1979, Linda went on to write four Harlequin "Superromances", making history by introducing the first disabled leading man ever to appear in a Harlequin romance novel.
The "Harry Potter" series of fantasy novels by J. K. Rowling have become some of the most widely read works of children's literature in history, with readers of all ages and in many countries.
 In April 2011 worldwide sales of Harry Potter books were estimated to be about 450 million copies.
 Oddly enough, it has been difficult to accurately determine with any degree of certainty exactly how many languages Harry Potter has been translated into.
 As best as can be determined (as of 2017), The Philosopher's Stone has been officially translated from the original English into 73 other languages.
 A 74th language, Scots, was announced on 2017-06-28 and it is expected to be available in October, 2017.
 Both Bloomsbury's and J.K. Rowling's sites have recently stated that the books have been translated into 79 languages (80 with the 2017-06-28 announcement of Scots); however, it has been argued that number actually represents the number of authorized translations (of The Philosopher's Stone) plus the original English.
 The number of authorized translations is not equal to the number of languages because there have been multiple authorized translations into the same language.
 Specifically, there have been two separate translations into each of: Mandarin Chinese, Portuguese, Romanian, Russian and Turkish (5 languages).
 English is often included in the list of translations even though technically it should not be (indeed, it is why our list here counts up to 74).
 Thus: 79 − English − 5 double-translations = 73.
 It is also worthwhile to emphasize that not all seven books are have been translated into these 73 languages.
"Happy Birthday to You", more commonly known as simply "Happy Birthday", is a song that is traditionally sung to celebrate the anniversary of a person's birth.
 According to the 1998 "Guinness World Records", "Happy Birthday to You" is the most recognized song in the English language, followed by "For He's a Jolly Good Fellow".
 The song's base lyrics have been translated into at least 18 languages.
 The melody of "Happy Birthday to You" comes from the song "Good Morning to All", which has traditionally been attributed to American sisters Patty and Mildred J. Hill in 1893, although the claim that the sisters composed the tune is disputed.
Elena Ferrante (] ) is the pseudonym of an Italian novelist.
 Ferrante's books, originally published in Italian, have been translated into many languages.
 Ferrante's "Neapolitan Novels" are among her best known works.

Question: Patty Hill is perhaps best known for co-writing, with her sister Mildred Hill a song that was translated into how many languages ?
Answer: 18 languages