Seeing as Mum is unlikely to ever read this, I can safely say that years of her pestering me on spelling and grammar has paid of to an extent. I have noticed a few prime examples of poor English recently. In an IT system, it can lead to a real lack of confidence.
First and foremost is the ATM at my local cafe - it has a spelling error in the account names. I apparently have a checking account. My first thought "checking, what am I checking?". Of course when I hit that button and did successfully withdraw funds from my cheque account. But that raised an element of doubt in my mind! If something as simple as the spelling on an interface with 10 words on it can be wrong, what is their code like behind the scenes? Is it polished and well thought out? does it keep my details secure, or is it going to broadcast my card and pin number to the world?
The message: One fairly simple mistake in the spelling has greatly reduced my confidence in the product. Of course all your messages and strings are store in a resource file, so updating those spelling mistakes should be a simple task, right?
Another one I found - while driving my car to work - a big electronic sign informing me that 'Police Enforce Speeding'. The instruction is not exactly clear, they are enforcing speeding? so I HAVE to speed do I?