Which languages are derived from the language used by Vikings?

It's not accurate to say that any modern language is directly "derived" from the language of the Vikings. However, the language spoken by the Vikings, Old Norse, is the ancestor of several modern Scandinavian languages.

Here are the languages that evolved from Old Norse:

* Icelandic: The language most closely resembling Old Norse, due to its relatively limited contact with other languages.

* Faroese: Spoken on the Faroe Islands, it's also quite similar to Old Norse.

* Norwegian: Divided into two main branches: Bokmål (more influenced by Danish) and Nynorsk (more closely related to Old Norse).

* Swedish: While influenced by Danish, Swedish still shares a lot of vocabulary and grammar with Old Norse.

* Danish: Though its written form changed significantly, Danish still retains features from Old Norse.

It's important to note that these languages have evolved significantly over time, developing their own unique characteristics and borrowing words from other languages. While they share a common ancestor in Old Norse, they are distinct languages with their own identities.