Language Switcher Typo3

Language Switcher Typo3

I'm trying to create a language switch with personal images that makes
possible to change the website language in the frontend (i already defined
the languages and the alternative language pages). I'm using a snippet
from Typo3 Core Documentation, but it's not working for me, so i must be
doing something wrong...I added a marker in my template called LANGUAGE,
which corresponds to a DIV in the top right corner of the main container,
where would appear some representative flags of the languages available
for that page.
Here it is my TS code in the Template:
config.linkVars = L , type
config.sys_language_uid = 0
config.language = en
config.locale_all = en_EN
[globalVar = GP:L =0]
config.sys_language_uid = 0
config.language = en
config.locale_all = en_EN
config.htmlTag_langKey = en
[global]
[globalVar = GP:L =1]
config.sys_language_uid = 1
config.language = pt
config.locale_all = pt_PT
config.htmlTag_langKey = pt
[global]
[globalVar = GP:L =2]
config.sys_language_uid = 2
config.language = fr
config.locale_all = fr_FR
config.htmlTag_langKey = fr
[global]
[globalVar = GP:L =3]
config.sys_language_uid = 3
config.language = de
config.locale_all = de_DE
config.htmlTag_langKey = de
[global]
page.10.marks.LANGUAGE {
lib.langMenu = HMENU
lib.langMenu {
special = language
special.value = 0,1,2
special.normalWhenNoLanguage = 0
1 = GMENU
1.NO {
XY = [5.w]+4, [5.h]+4
backColor = white
5 = IMAGE
5.file = fileadmin/Template/images/english.png ||
fileadmin/Template/images/portuguese.png ||
fileadmin/Template/images/french.png ||
fileadmin/Template/images/german.png
5.offset = 2,2
}
}
}