[TYPO3-english] Problems with alternative site language

[Typoq]

Hi *,

hope someone can give me a hint how to solve my problem.

I use Typo3 4.2.12. Although I am planning to create a multilingual site in 
the future I am currently only using the default language (english). I've 
already prepared the template setup to be able to handle additional 
languages in the future. I have not yet created any translations and there 
is no "Language" entry in the drop down if I choose a page in the backend.
The weird thing is that I can use a browser to open a page like 
http://my.webdomain.com/index.php?id=19&L=1 and it will return the default 
version although it should not. This works for some pages but not for all 
pages. Since I have not used "New --> Website Language" these "translated" 
pages should not exist anyway.
How can I get rid of this behavior? Since I could not find any other 
possibility I edited the page properties for every single page and told 
Typo3 to "Hide page if no translation for current language exists". This 
works but it sure is awkward.

Thanks for your help
Rob