how to add languages to your phone

I tried to add the italian language to my K810i EUROPE_2 with the R8BA024 firmware but I was unable to use the FAR manager plug-in; then I used XS++ to just add the it.* files to the phone without modifing the the allowed_language.txt and customize.xml files.
The first time I tried, I didn't delete the lng.lst and lng.dat files and used upper-case for the file names and the phone showed the Italian as phone language but not as wirting language.
The second time, after using lower-case file name and deleting lng.lst and lng.dat the phone showed the italian language ONLY as writing language (that's good for me).
:confused:
I propose to set this post as Sticky so it cold be easy to find instructions to change language. :cool:

where I can downlaod FAR with SEFP?

Try download from here
Using FAR+SEFP with a DB2012 DB2020 phone (Guide) - Top Sony Forums

chinese font + edit customize.xml + language files + allowed_language.txt all you need i think. See the How to add languages to your phone post.

Is there any way that i can put in hindi or punjabi language into my phone....
im using a k800i with R8BA024..

Hello. this depends on language too. If you're adding some non english related language. you'll need the FONT for that language too. For example, chinese, you'll need the font inside the folder tpa/preset/system/fonts too or it won't work.

That means if I want to add Thai language, I have to extract the language files from Thai firmware and put them in the new firmware?

can anyone be more clear way to do it??

thanks, really helpful. I have always thought that I should get the whole custpack...

I have installed some lng files on my K770 and these langs are only available as writing languages.Is this right??