What group added 2,000 more words to the indo-european language around the 700 and 800’s?

Norse

Explanation:

English originally developed out of the Indo-European language that was carried from India all over Europe. Throughout its history, this language was influenced by many different cultures, such as Celtic, Latin and Germanic. Around the 700s and 800s, successive Viking invasions brought the influence of the Norse language on English. The consequence of this was the addition of around 2,000 more words to the language.

answer; i believe the correct answer is (fluctuated);