[jaiemm]

Yes you can. I did with mine last weekend.

Hi Kadri,

Did it also convert the language on your dashboard and voice command?

 

[jaiemm]

@jaiemm,

Were you successful in changing the Japanese firmware to an European firmware?

Yes, I have successfully converted it to English. Just follow the instructions and download the files for your region, from the link provided by Polari. There are also tutorials on youtube.