First of all, congratulations on your purchase.
I have got Honda fit hybrid and the language on its instrument panel and internavi is Japanese. From the little research I've done, i couldn't find how to change the language or maps. Ppl have suggested to swap the navigation unit, but i don't want to go that route because the original one integrates with the console really well and also because of high cost of the swap.
One thing that helped me understanding and changing instrument panel options is that i have downloaded English user manual of Honda fit and with the help of Google translate i can relate to the corresponding settings. Google translate has an option to take a picture and translate the text in that image.
Hope this helps