Flashing my G705 to W715

So just got a nice new g705 but only got English and Chines on it, and since im Danish I would really like a Danish T9.
Dosent look like there is any Nordic firmware out for the G705, is there any other way to get a new language onto the phone?
Or do i have to install firmware from another phone type like the W715 to get Danish T9?

In advance thanks for your help

why you want to flash to w715?

I have heard there may be compatibility problems if you crossflash your phone so do backup and be careful.