HELP ME!!! How to write a new language...

[actcz]

Hi,

I have a problem with languages for BMW E91. I can like my language in my car, but is not in car
Where is a writing language? In what modules? And how to a write or re-write a new languages.

Thanks for help...

Adam

[Codes2]

Any chance you can clarify that question?
Our cars have many many modules each with their own code.

[actcz]

Any chance you can clarify that question?
Our cars have many many modules each with their own code.

I mean a display message, errors and settings in my language (czech) not in english or deutch.
Thank you