what you need  : 

1. Root and CWM 

2. the rom zip file 

3. the latest gapps from goo.im  ( but playstore is in ) 

Flash via CWM  , copy zip on internal SD 

wipe data factory reset , wipe cashe , wipe dalvik …

install zip. file from SD .

install Gapps for jb latest ( from goo.im ) 

wipe the same as before , 

boot takes a while  ( when longer as 5 min. , go to recovery and wipe data factory reset ) 

it is english , chinesse and german 

for more languages , look this video : https://www.youtube.com/watch?v=H-oHa8gs9UA

thx at the guy from chinamobilemag