[TYPO3-english] Add language parameter to external link

[Tony Lush]

I have a TYPO3 site in three languages that links to a sister catalog 
site that is also in the same languages. I would like to append the 
currently active L parameter to the external link so the user goes 
directly to the correct language. The languages are English, Spanish and 
Chinese, TYPO3 4.2.2, RealURL 1.5.2.

Thank you -- Tony Lush