[Typo3] default language on certain page(and its subpages)

[Vladimir Nikolov]

Hello all,
I want one of my pages(with all its subpages) to be showed only in my 
default language. No matter of globalVar "L" is set, I want to open a page 
with no globalVar "L".
Example:
current page I am on:
http://mypage.com/index.php?id=20&L=2

and when I click the page with id = 30(which have to be in default 
language)this page to be opened:
http://mypage.com/index.php?id=30

not this:
http://mypage.com/index.php?id=30&L=2

Thanks in advance.

Vladimir