2
There are two reasons for that:
Missing a language file, the system only finds english version for these items.
Translation to swedish is notcomplete, this english text is taken from the swedish language files, but someone forgot to translate these phrases.
Do you use Dreamweaver? If you do, just do a "find in the whole site" to see where is this phrase located in the swedish files, then translate it. If Dreamweaver just finds it in the english files, just copy-paste-translate it.