First you need to Know, which Firmware you got in your Phone
at the moment.
FOr That connect Your Phone with XS++.

Now, if you Know which Main Firmware you got, you have to find out which
FS (Filesystem) included your Language.

If YOu got the correct FS (Same Version than MAIN) you can flash
it with XS++ to your Phone, by using correct CDA String.
Dont forget enable customize.

I think all you need, will find on this great Site.


SOrry for my bad english :)