[TYPO3-english] Changing default language in Templavoila

[ktt]

Hello,

How to change default language in Templavoila?
I did changes in TS template - 

config.sys_language_uid = 1
config.locale_all = en_GB.UTF-8
config.language = en

Previous was German L=0.
But German still appears as main language in backend,
and English being shown as localisation.
In frontend everything works ok.

Thank you in advance,
Kast A.