You know you use a foreign language too often, if...

Some people say that you are able to use a foreign language if you start dreaming in it. I say that this is not important. It is important to see if you can still see the difference to your mother tongue.

I read a lot of english books, watch movies and tv series in english only and this is what happened to me: When trying to enter the bank to get to the ATM on sunday I came across the switch telling me "NOT FALL".

I did not understand this. It does not make any sense at all.

It is still summer and not fall

If you know that I am a native Austrian and "NOT FALL" can be written "NOTFALL" and means emergency you will get to the point I have been. I did not recognize the meaning in the first place. My first thought was "Of course it is not fall, because it's still summer!".

So the semiosis got into a dilemma and wasn't unambiguously. My girlfriend is still believing I played a prank on her. Saussure, please help....