Languages of Sweden
The Language Law of 2009 recognizes Swedish as the "main" and "common" language of society as well as being the official language in "international contexts".
Name of Sweden
The name of Sweden was Latinized as "Suecia" adopted in various Romance and Slavic languages, including Spanish "Suecia", Catalan "Suècia", Portuguese "Suécia", Russian Швеция "Shvetsiya", and in non-European languages influenced by such languages, In these languages, there is frequent confusion between the names of Sweden and of Switzerland (Spanish "Suiza", Catalan "Suïssa", Portuguese "Suíça", Russian Швейцария "Shveytsariya"). There is a historical tradition going back to at least the 15th century to the effect that Schwyz (the settlement which gave its name to Switzerland) was indeed named after the Swedes.
Ericus Olai in his "Chronica regni Gothorum " (c. 1470) notes the similarity in toponymy, "Swycia, quasi Suecia". This tradition was taken seriously in 19th-century scholarly reception of the Swiss Swedish origin legend, especially in Swedish romantic nationalism (e.g. Erik Gustaf Geijer's 1836 "History of the Swedes"), but is not now considered likely.