The period that includes Swedish as it is spoken today is termed nusvenska ("Contemporary Swedish", lit. "Now-Swedish") in linguistic terminology. With the industrialization and urbanization of Sweden well under way by the last decades of the 19th century, a new breed of authors made their mark on Swedish literature. Many authors, scholars, politicians and other public figures had a great influence on the new national language that was emerging, the most influential of these being August Strindberg (1849–1912).

It was during the 20th century that a common, standardized national language became available to all Swedes. The orthography was finally stabilized, and was almost completely uniform, with the exception of some minor deviations, by the time of the spelling reform of 1906. With the exception of plural forms of verbs and a slightly different syntax, particularly in the written language, the language was the same as the Swedish spoken today. The plural verb forms remained, in ever decreasing use, in formal (and particularly written) language until the 1950s, when they were finally officially abolished even from all official recommendations.

A very significant change in Swedish occurred in the 1960s, with the so-called du-reformen, "the you-reform". Previously, the proper way to address people of the same or higher social status had been by title and surname. The use of herr ("Mr" or "Sir"), fru ("Mrs" or "Ma'am") or fröken ("Miss") was only considered acceptable in initial conversation with strangers of unknown occupation, academic title or military rank. The fact that the listener should preferably be referred to in the third person tended to further complicate spoken communication between members of society. In the early 20th century, an unsuccessful attempt was made to replace the insistence on titles with ni (the standard second person plural pronoun) — analogous to the French Vous. Ni (plural second person pronoun) wound up being used as a slightly less familiar form of du (singular second person pronoun) used to address people of lower social status. With the liberalization and radicalization of Swedish society in the 1950s and 60s, these previously significant distinctions of class became less important and du became the standard, even in formal and official contexts. Though the reform was not an act of any centralized political decrees, but rather a sweeping change in social attitudes, it was completed in just a few years from the late 60s to early 70s.