Question: When did swedish become the official language of the country that contains the Embassy of France in the city where Christer Strömholm died?

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: Minor White: Minor Martin White (July 9, 1908 – June 24, 1976) was an American photographer, theoretician, critic and educator. He combined an intense interest in how people viewed and understood photographs with a personal vision that was guided by a variety of spiritual and intellectual philosophies. Starting in Oregon in 1937 and continuing until he died in 1976, White made thousands of black-and-white and color photographs of landscapes, people and abstract subject matter, created with both technical mastery and a strong visual sense of light and shadow. He taught many classes, workshops and retreats on photography at the California School of Fine Arts, Rochester Institute of Technology, Massachusetts Institute of Technology, other schools, and in his own home. He lived much of his life as a closeted gay man, afraid to express himself publicly for fear of loss of his teaching jobs, and some of his most compelling images are figure studies of men whom he taught or with whom he had relationships. He helped start and for many years was editor of the photography magazine "Aperture". After his death in 1976, White was hailed as one of America's greatest photographers.
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: 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.
Document 5: 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 6: Christer Boustedt: Christer Boustedt (21 March 1939 in Bromma – 4 September 1986 in Alfta, Ovanåker Municipality) was a Swedish musician and actor. He was primarily a jazz musician playing the saxophone, and contributed film music to many Swedish films.
Document 7: Sy Kattelson: Seymour Kattelson (February 11, 1923 – November 24, 2018), better known as Sy Kattelson, was an American photographer whose earliest work documents working class New Yorkers during the years immediately following World War II. He was an early practitioner of street photography and was associated with the Photo League from 1947 until its closing in 1951. His portraits, frequently taken without his subjects' awareness while traveling through the streets or riding the city's subways, convey the dignity of their lives as lived in public places. The depth of his photographs often comes from the tension between the grittiness of their urban settings and the contemplative sense of his subjects' as being lost within themselves. He died in Rhinebeck, New York in November 2018 at the age of 95.
Document 8: Christian Magdu: A recognizable name and face in Sweden, Christian started working as an actor straight out of high school in the touring play ""Europe 1697"". Even though he studied sciences in high school it was the liberal arts and most of all theater, that was his great passion. He attended two famous, Swedish theater conservatories - Wendelsberg in 1998 and the highly prestigious, highly competitive Skara Skolscen in 2000. Christian describes Skara Skolscen as his most valuable time evolving as a new actor.
Document 9: 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 10: 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 11: 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 12: 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 13: 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 14: 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 15: Christer Strömholm: Christer Strömholm (22 July 1918 in Stockholm – 11 January 2002 in Stockholm), also known by the pseudonym Christer Christian, was a Swedish photographer and educator. He is known for his intimate black and white street photography portrait series.
ground_truth: 20th century
sub_queries: In what city did Christer Strömholm die? Answer: Stockholm
Embassy of France, Stockholm >> country Answer: Sweden
when did swedish become the official language of Sweden Answer: 20th century