The hilarious slip happened in the Swedish translation of Android 4.2 where one of the notifications mistakes the Nexus for an iPhone, and pops up the following message (rough translation follows):
"WARNING! Any operator data charges may apply. The configuration of the iPhone can require significant network activity.”
The issue was originally noticed on a Samsung Galaxy Nexus, but it can also be reproduced on a Nexus 4. A change in the Android Open Source Project has already fixed the issue, but its existence is what’s fun in the first place. You can try and reproduce it by going into /system/app/SetupWizard.apk on your Nexus.
source: Android via Reddit, Android Police