[Typo3] Conditions in TV-TS or: TV image with language dependend alttext

[David Rosenkranz]

Hi,

I have defined an FCE which contains an image element. I have wrapped the
image with a "click-to-enlarge"-link. Now I want the image to have a
language dependend alt tag which says "Click to enlarge" in the languages
featured by my website. I guess I can do that by editing the TypoScript of
the image element of this FCE. I tried the following. But somehow the
condition does not work:

<TypoScript>
	10 = IMAGE
	10.file.import = uploads/tx_templavoila/
	10.file.import.current = 1
	10.file.import.listNum = 0
	10.file.maxW = 167
	###################################
	### BEGIN code to enlarge image ###
	###################################
	10.imageLinkWrap = 1
	10.imageLinkWrap {
	  width = 800m
	  height = 600m
	  JSwindow = 1
	  JSwindows {
	    newWindow = 0
	    expand = 17,20
	    }
	
	  enable = 1
	  typolink.parameter.field=image_link
	  typolink.extTarget = _blank
	}
	#################################
	### END code to enlarge image ###
	#################################
	10.alttext = Klicken zum Vergroessern
	[globalVar = GP:L = 1]
	10.alttext = Click to enlarge
	[globalVar = GP:L = 2]
	10.alttext = CLICK TO ENLARGE
	[globalVar = GP:L = 3]
	10.alttext = CLICK TO ENLARGE
	10.titletext = {alttext}
</TypoScript>

(the last line sets the titletext to the value of the alttext - it works)

Instead of displaying the localized version of the alttext, it is always
"Klicken zum Vergroessern".

Do you have a hint for me to get this working?

Thanks a lot.

Greetings from Switzerland
David