Can't change continue reading title from "(more…)"

Hey there!

Okay, so I’m building a new site using the great Twenty Twelve theme, but when I’m practically done with some minor changes to the theme I found that the button I had made for the more-tag had changed to “(more…)”. It’s done on content.php (where I changed it the first time) but nothing is changed from the way it were, and I can’t find the “(more…)”-thing on any page (I have looked through index.php, functions.php, etc). It almost seems as if WordPress had made the change on it’s own and now I can’t change it back. I have looked practically everywhere on Google to find the problem but I just can’t find the right fix. All of the results just explain what I did in the first place to change from “continue reading” (which doesn’t work now either, by the way) to a custom title/image. Thankful for any help!