Even after coding, Navigation maps are separate. Changing the language utility won't magically give you Japanese street names on a European map DVD.
The BMW CIC Language Coding Utility isn't a product you buy; it's a capability you learn. If you are comfortable with hex code and command-line-level tools, NCS Expert gives you total control. If you want a plug-and-play solution, spend the $40 on a modern mobile coding app. bmw cic language coding utility
Owners typically seek out this utility for three primary reasons: Even after coding, Navigation maps are separate