When you cancel your subscription you get the message
You will receive a confirmation email shortly containing further instructions on how to complete the unsubscription process.
"Unsubsciption" isn't a word and the sentence doesn't read right. A better senence would be
You will receive a confirmation email shortly containing further instructions on how to cancel your subscription.
At this stage I have to use the stringoverrides module to fix it.
Problem lines in code:
Line 85, Line 164
I've attached an updated simplenews.subscription.inc to make life a bit easier for the developers. Hope this helps!