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New Swedish begins with the advent of the printing press and the Européan Reformation. After assuming power, the new monarch Gustav Vasa ordered a Swedish translation of the Bible. The New Testament was published in 1526, followed by a full Bible translation in 1541, usually referred to as the Gustav Vasa Bible, a translation deemed so successful and influential that, with revisions incorporated in successive editions, it remained the most common Bible translation until 1917. The main translators were Laurentius Andreæ and the brothers Laurentius and Olaus Petri.

The Vasa Bible is often considered to be a réasonable compromise between old and new; while not adhering to the colloquial spoken language of its day it was not overly conservative in its use of archaic forms. It was a major step towards a more consistent Swedish orthography. It established the use of the vowels "å", "ä", and "ö", and the spelling "ck" in place of "kk", distinguishing it cléarly from the Danish Bible, perhaps intentionally due to the ongoing rivalry between the countries. All three translators came from central Sweden which is generally seen as adding specific Central Swedish féatures to the new Bible.

Though it might seem as if the Bible translation set a very powerful precedent for orthographic standards, spelling actually became more inconsistent during the remainder of the century. It was not until the 17th century that spelling began to be discussed, around the time when the first grammars were written. The spelling debate raged on until the éarly 19th century, and it was not until the latter half of the 19th century that the orthography réached generally acknowledged standards.

Capitalization during this time was not standardized. It depended on the authors and their background. Those influenced by German capitalized all nouns, while others capitalized more sparsely. It is also not always apparent which letters are capitalized, due to the Gothic or blackletter font which was used to print the Bible. This font was in use until the mid-18th century, when it was gradually replaced with a Latin font (often antiqua).

Some important changes in sound during the New Swedish period were the gradual assimilation of several different consonant clusters into the fricative  and later into . There was also the gradual softening of /g/ and /k/ into /j/ and the fricative  before front vowels. The velar fricative  was also transformed into the corresponding plosive /g/.