Question: When did Swedish become the official language of the country where the Embassy of France is in the city where Alfred Nobel was born?

full_context: Document 1: Embassy of France, Prague: The Embassy of France to the Czech Republic is located on Velkopřevorské náměstí, in Malá Strana, Prague, next to Vltava's island Kampa. It occupies the large baroque Buquoy Palace (1719). The ground floor of the Embassy was flooded during the August 2002 floods.
Document 2: Embassy of France, Stockholm: The Embassy of France in Stockholm is the diplomatic mission of the French Republic in Sweden. The chancery is located at Kommendörsgatan 13.
Document 3: Old English: Old English developed from a set of Anglo-Frisian or North Sea Germanic dialects originally spoken by Germanic tribes traditionally known as the Angles, Saxons, and Jutes. As the Anglo-Saxons became dominant in England, their language replaced the languages of Roman Britain: Common Brittonic, a Celtic language, and Latin, brought to Britain by Roman invasion. Old English had four main dialects, associated with particular Anglo-Saxon kingdoms: Mercian, Northumbrian, Kentish and West Saxon. It was West Saxon that formed the basis for the literary standard of the later Old English period, although the dominant forms of Middle and Modern English would develop mainly from Mercian. The speech of eastern and northern parts of England was subject to strong Old Norse influence due to Scandinavian rule and settlement beginning in the 9th century.
Document 4: Old English: Old English is a West Germanic language, developing out of Ingvaeonic (also known as North Sea Germanic) dialects from the 5th century. It came to be spoken over most of the territory of the Anglo-Saxon kingdoms which became the Kingdom of England. This included most of present-day England, as well as part of what is now southeastern Scotland, which for several centuries belonged to the Anglo-Saxon kingdom of Northumbria. Other parts of the island – Wales and most of Scotland – continued to use Celtic languages, except in the areas of Scandinavian settlements where Old Norse was spoken. Celtic speech also remained established in certain parts of England: Medieval Cornish was spoken all over Cornwall and in adjacent parts of Devon, while Cumbric survived perhaps to the 12th century in parts of Cumbria, and Welsh may have been spoken on the English side of the Anglo-Welsh border. Norse was also widely spoken in the parts of England which fell under Danish law.
Document 5: Crimean War: Part of the Russian resistance was credited[by whom?] to the deployment of newly invented blockade mines. Perhaps the most influential contributor to the development of naval mining was a Swede resident in Russia, the inventor and civil engineer Immanuel Nobel (the father of Alfred Nobel). Immanuel Nobel helped the Russian war effort by applying his knowledge of industrial explosives, such as nitroglycerin and gunpowder. One account dates modern naval mining from the Crimean War: "Torpedo mines, if I may use this name given by Fulton to self-acting mines underwater, were among the novelties attempted by the Russians in their defences about Cronstadt and Sevastopol", as one American officer put it in 1860.
Document 6: Embassy of Sweden, Prague: The Swedish Embassy to the Czech Republic is located on Úvoz street, in Hradčany, the castle region of Prague. It is close to the Strahov Monastery. The embassy has a great view of the rest of Prague because it is located up on the hill. A pedestrian path, named after Swedish diplomat Raoul Wallenberg, who saved thousands of Jews from the Holocaust, leads from embassy up to the Petrin Hill.
Document 7: Embassy of Sweden, Rome: The Embassy of Sweden in Rome is Sweden's diplomatic mission in Italy. The current building was built between 1965-1966 and completed in 1967.
Document 8: Fredrik Reinfeldt: In 1965, Fredrik Reinfeldt was born in Allmänna BB hospital in Stockholm and was the oldest of three brothers to his parents Bruno (1938-2016) and Birgitta Reinfeldt. At the time of his birth his parents lived in an apartment in Österhaninge, in the south of Stockholm County, but a short time afterwards the family moved to London, where his father worked as a consultant for Shell. Upon returning to Sweden, the family first lived in an apartment in Handen before moving to a terraced house in Bromsten in northwestern Stockholm. The Reinfeldt family was living in Bromsten when Fredrik's younger brothers, Magnus and Henrik, were born in 1969 and 1973. In 1976 the family moved into a single-family home in Täby in northeastern Stockholm County. His mother Birgitta was a leadership and management consultant, and some of her professional skills might have inspired and impressed the young Fredrik.
Document 9: Marta Helena Nobel-Oleinikoff: Marta Helena Nobel-Oleinikoff (Russian: Марта Людвиговна Нобель-Олейникова), née Marta Helena Nobel (9 October 1881, Saint Petersburg – 1973, Stockholm), was a Russian-Swedish physician and philanthropist and member of the Nobel family. She was the daughter of industrialist and humanitarian Ludvig Nobel and the niece of Alfred Nobel.
Document 10: Dutch language: Old Dutch naturally evolved into Middle Dutch. The year 1150 is often cited as the time of the discontinuity, but it actually marks a time of profuse Dutch writing and during this period a rich Medieval Dutch literature developed. There was at that time no overarching standard language; Middle Dutch is rather a collective name for a number of closely related dialects whose ancestor was Old Dutch. But they were all mutually intelligible. In fact, since Dutch is a rather conservative language, the various literary works of that time today are often very readable for modern-day speakers.
Document 11: Alfred Nobel: Born in Stockholm, Alfred Nobel was the third son of Immanuel Nobel (1801–1872), an inventor and engineer, and Carolina Andriette (Ahlsell) Nobel (1805–1889). The couple married in 1827 and had eight children. The family was impoverished, and only Alfred and his three brothers survived past childhood. Through his father, Alfred Nobel was a descendant of the Swedish scientist Olaus Rudbeck (1630–1702), and in his turn the boy was interested in engineering, particularly explosives, learning the basic principles from his father at a young age. Alfred Nobel's interest in technology was inherited from his father, an alumnus of Royal Institute of Technology in Stockholm.
Document 12: Languages of Sweden: Swedish evolved from Old Norse around the 14th and 15th century, and historically, the Swedish dialects were generally much more different than today. Since the 20th century Standard Swedish prevails throughout the country. The Scandinavian languages constitute a dialectal continuum and some of the traditional Swedish dialects could equally be described as Danish (Scanian) or Norwegian (Jamtlandic).
Document 13: Switzerland: Aside from the official forms of their respective languages, the four linguistic regions of Switzerland also have their local dialectal forms. The role played by dialects in each linguistic region varies dramatically: in the German-speaking regions, Swiss German dialects have become ever more prevalent since the second half of the 20th century, especially in the media, such as radio and television, and are used as an everyday language, while the Swiss variety of Standard German is almost always used instead of dialect for written communication (c.f. diglossic usage of a language). Conversely, in the French-speaking regions the local dialects have almost disappeared (only 6.3% of the population of Valais, 3.9% of Fribourg, and 3.1% of Jura still spoke dialects at the end of the 20th century), while in the Italian-speaking regions dialects are mostly limited to family settings and casual conversation.
Document 14: Emil Oskar Nobel: Emil Oskar Nobel (; ; also Oscar; 1843 – 3 September 1864) was a member of the Nobel family, the youngest son of Immanuel Nobel, and of his wife Caroline Andrietta Ahlsell. He was the brother of Robert Nobel, Ludvig Nobel and Alfred Nobel. He was the only one of the Nobel family to go to college, going to the Swedish University of Uppsala. Emil died on September 3, 1864, the victim of an explosion while experimenting with nitroglycerine in his father's factory in Heleneborg, Stockholm. His brother Alfred later managed to stabilize dynamite with a diatomaceous earth called kieselguhr. Alfred was not in the factory at the time of Emil’s death.
Document 15: Embassy of France, London: The Embassy of France in London is the diplomatic mission of France to the United Kingdom. Located just off Knightsbridge at Albert Gate, one of the entrances to Hyde Park, it is situated immediately opposite the Embassy of Kuwait.
ground_truth: 20th century
sub_queries: In what city was Alfred Nobel born? Answer: Stockholm
Embassy of France, Stockholm >> country Answer: Sweden
when did swedish become the official language of Sweden Answer: 20th century