[TYPO3-english] How to pass a parameter through a whole TYPO3 site in 4.5 respecting caching?

[Stephen Bungert]

I use 4.6.x

noCache is not needed to pass the vars around from pages and sites. just 
having the variables in linkVars is enough.

I think there must be something about your setup because to get languages to 
work linkVars needs to have L in it, and that used to work on my old 4.5 
install without setting noCache.

Bit L is also a special var for TYPO3, maybe it is handled differently 
internally?