The roots of the Icelandic language can be traced back to around 9th century Scandinavia and, in particular, the Viking settlement in what is now considered Iceland. These Viking settlers brought Old Norse to the region, and the isolation of the region from other Nordic communities would lead this version of Old Norse to diverge from versions in Nordic regions. More specifically, mainland counterparts would begin to shift and evolve, while Icelandic Norse would remain relatively unchanged.
This isolated language would eventually evolve into Icelandic proper, and the 19th century would see standardization efforts across grammar and spelling. The language and the culture around the language would remain conservative into the modern day, as efforts are made to resist influence from other languages like English. Some international vocabulary has been absorbed, but efforts are generally made to introduce new Icelandic-based words rather than bothering from other languages.