According to Lilja Nótt Þórarinsdóttir's working experience and career, she mostly worked in television series and films that originally used English language only, Now, we can say that Lilja Nótt Þórarinsdóttir is very fluent in the English language, especially American English language comparison to other languages spoken in Hollywood entertainment industries such as British English, Spanish, French, German, Italian, and so on.