I recently ordered a Walkman NW-S775 from Japan.
The device is in Japanese and there is no language setting to change this. Does anyone know of anything i can install so that the device is in English?
I suggest looking on utube for any videos of this model that show the user interface and try to find the 'settings' menu. From the settings menu there will be a 'language setting', you should know when you open that setting because there will be text in different languages. For an easy fix I do not know of one unless someone can chime along who owns the unit. In the meantime I suggest trying my method.
I found this for you (not a fix) more some information.