[TYPO3-english] Translation not working for typo3 extensions

[PIT Solutions]

Hi All,

I want to translate felogin extension using typoscript configuration. My typo3 version is 4.7.2.
My default language is Deutsch and the optional language is English.

For adding English translation using typoscript, I've added the code "plugin.tx_felogin_pi1._LOCAL_LANG.en.username = User Name".
But it is not working. When I changed "en" to "default", it is working (i.e. "plugin.tx_felogin_pi1._LOCAL_LANG.default.username = User Name").

I want to translate the username by using the code "plugin.tx_felogin_pi1._LOCAL_LANG.en.username".

My language configuration is;

config.linkVars = L
config.sys_language_uid = 0
config.sys_language_mode = content_fallback
config.language = de
config.locale_all = de_DE

[globalVar = GP:L = 1]
config.sys_language_uid = 1
config.language = en
config.locale_all = en_GB
[global]

If anybody knows the solution, please help me.

Thanks in advance,
Arun Chandran.