@Olivier5,
The language of the Vikings could be heard in all of Europe for about 1000 years ago. Geographically it was the most spread language. From New foundland over Greenland, Scandinavia to Russia in east and to England and Normandy in the south you could hear people speak nordic
It was not everybody who lived in these areas who spoke nordic. It was the Vikings who had the power so many spoke the language
In England the influence by the Vikings language wise lasted up till our dasy.
About 2% of English have borrowed words from Nordic languages, but of those two % includes some of the most common and used words in English.
Kake=cake, kalla= call, ägg=egg, giva=give husbonde=husbond, skinn=skin
sky=sky taga=take they=de them=dem vindue=window vinge=wing