[TYPO3-dev] Value of dynamic name variable typoscript

[gal typo]

It's ok, i get it, now I have the "Website Language" options!

But, I think that the best solution for me his my first solution, because I want to have in a file locallang.xml all translations labels (pages,texte, etc..). Unfortunately, my typoscript can't see "English" lang translations (in my website I want to have French as the default language and I want to translate all French labels used to English). 
PS : I have an english typo3 installation.

My locallang.xml file :
<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<T3locallang>
	<meta type="array">
		<type>module</type>
		<description>Language labels</description>
	</meta>
	<data type="array">
		<languageKey index="default" type="array">
			<label index="lib_accueil">Accueil (default)</label>
		</languageKey>
		
		<languageKey index="fr" type="array">
			<label index="lib_accueil">Accueil (fr)</label>
		</languageKey>
		
		<languageKey index="en" type="array">
			<label index="lib_accueil">Accueil (en)</label>
		</languageKey>
	</data>
</T3locallang>

My typoscript :
# French language
config.sys_language_uid = 1
config.language = fr
config.htmlTag_langKey = fr-FR
config.locale_all = fr_FR

# French language
[globalVar = GP:L=1]
  config.sys_language_uid = 1
  config.language = fr
  config.htmlTag_langKey = fr-FR
  config.locale_all = fr_FR
[global]

# English language
[globalVar = GP:L=2]
  config.sys_language_uid = 2
  config.language = en
  config.htmlTag_langKey = en-EN
  config.locale_all = en_En
[global]

lib.myfield=TEXT
lib.myfield.data = LLL:fileadmin/templates/language/locallang.xml:lib_accueil

The results is always:
"Accueil (default)" ( and not "Accueil (en)" when &L=2)