Question: Who is the author of the opera which had its English version translated by English composer Stephen Michael Harding Oliver?

Context paragraphs:
The Duchess of Malfi (opera): The Duchess of Malfi is an opera in three acts by the British composer Stephen Oliver, based on the eponymous play by John Webster.  Oliver originally wrote this opera, his ninth in 1971, at age 21, for a production at the Oxford Playhouse on commission from the Oxford University Opera Club.  The premiere was on November 23, 1971, with the following cast members:

Kuningas lähtee Ranskaan: Kuningas lähtee Ranskaan (English: The King Goes Forth to France ) is an opera in three acts by Aulis Sallinen, based on the novel of the same title by Paavo Haavikko, who also wrote the libretto.  The English singing version is by Stephen Oliver.

Charles Edward Horn: Charles Edward Horn (21 June 1786 – 21 October 1849) was an English composer and singer.  He was born in St Martin-in-the-Fields, London, to Charles Frederick Horn and his wife, Diana Dupont.  He was the eldest of their seven children.  His father taught him music; he also took music lessons briefly in 1808 from singer Venanzio Rauzzini in Bath, Somerset.  Horn made his singing debut on 26 June 1809 with a performance in the comic opera "Up All Night, or the Smuggler's Cave" (words by Samuel James Arnold and music by Matthew Peter King) at Lyceum Theatre, London.  Horn continued singing, including a well-received turn in 1814 as Seraskier in Stephen Storace's "The Siege of Belgrade".  He achieved prominence with his portrayal of Caspar in the English version of Carl Maria von Weber's "Der Freischütz" in 1824.

Soul Mountain: Soul Mountain is a novel by Gao Xingjian.  The novel is loosely based on the author's own journey into rural China, which was inspired by a false diagnosis of lung cancer.  The novel is a part autobiographical, part fictional account of a man's journey to find the fabled mountain Lingshan.  It is a combination of story fragments, travel accounts, unnamed characters (referred to by the pronouns "I", "you", "she", etc.), and folk poetry/legends.  An English version translated by Mabel Lee was published in the United States on December 5, 2000.

English version schools (Bangladesh): English version school is a system of education in Bangladesh that follows the national curriculum and based upon text books translated from the Bengali language into English.  There are approximately 52 English version schools in Dhaka.  In 2011 the first Internet based English version school opened in Gazipur.

Bible translations into Maltese: The Maltese nationalist Mikiel Anton Vassalli, a convert to Protestantism, translated the Gospels and Acts of the Apostles into Maltese language.  This was then known as the "Kafir version".  Michael Camilleri (c.1814–1903), afterwards vicar of Lyford, Berkshire, revised Vassali's version translated the New Testament and the Book of Common Prayer into Maltese.

Gender in Bible translation: Gender in Bible translation concerns various issues, such as the gender of God and generic antecedents in reference to people.  Many in today’s churches have become conscious of and concerned about sexism.  Bruce Metzger states the English language is so biased towards the male gender that it may restrict and obscure meaning from original languages.  The New Revised Standard Version (NRSV) was one of the first major translations to adopt gender-neutral language.  The King James Version translated at least one passage using a technique that many now reject in other translations, "Blessed are the peacemakers, for they shall be called the children of God" (Matt.  5:9).  The Greek word υἱοὶ that appears in the original is usually translated as "sons", but in this passage the translators chose to use the term "children" that included both genders.  Opponents of gender neutral language believe that readers who are not familiar with the original languages, can be influenced by a compromised meaning they believe is feminist.

The Pirates (opera): The Pirates is an opera by composer Stephen Storace with an English libretto by James Cobb.  The work was partly adapted from Storace's 1786 opera, "Gli equivoci" and is remarkable as affording one of the earliest instances of the introduction of a grand finale into an English opera.  The work premiered at the Haymarket Theatre on November 21, 1792.  The opera became a huge success and is considered by many music critics to be Storace's best composition.  It was chosen as the starring prima buffa to be performed for King George III at the King's Theatre, London on 16 May 1794.

Gennithika Gia Sena/Always Broken: "Gennithika Gia Sena" ("Γεννήθηκα Για Σένα" or translated in English "I Was Born For You") and "Always Broken" is a song by Georgian-Greek pop singer Tamta featuring Greek-American DJ and producer Xenia Ghali and is the 23rd single in her entire singles discography.  The Greek version was written by Stan and the English version which is her 6th English song and her 24th single in her singles discography, which was written by Katrina Russ.  The song was digitally released via the iTunes Store by the Greek division of UMG Minos EMI on January 1, 2014.  This song has four different versions which are a Greek Version, English Version, Unplugged Greek Version by Tamta and an EDM Version by Xenia Ghali (feat.  Katt Rockell).  Which by the way all four were composed and produced by Xenia Ghali.

Stephen Oliver (composer): Stephen Michael Harding Oliver (10 March 1950 – 29 April 1992) was an English composer, best known for his operas.

Supporting paragraphs: Kuningas lähtee Ranskaan Stephen Oliver (composer)
Answer: Paavo Haavikko