Where can I edit the “(more…” text?

Hi, on my website I have several post where I have split them with the “more” function, because the text is so long. My page is norwegian, and I have translated wordpress, but the word “(more…) is not translated.

Where can I edit this? I want it to be: “Les resten av innlegget”.

There must be a file in the wordpress system where I can edit this, but where?