I think I've found a solution until something more robust comes to live: google translate for Android
https://play.google.com/store/apps/details?id=com.google.android.apps.translate (sorry if link is in polish)
What it can do is translate through camera and pictures. I tested that on Galaxy S5, camera didnt translate much but it did translate most of the stuff from screenshot from the SRPG studio I just googled for
So how it would work would be taking pictures of stuff you need to translate and use it as reference - sure, somewhat troublesome but probably not that much for people used to ROM Hacking
I came up with this idea today morning and it works. Just that, it works. I am sure there may be better apps to do it - maybe some sort of Windows/Linux on the fly desktop translator or Android Emulator that can view your desktop - Like I said, I'm just sharing my idea that I'll try to improve this weekend. Maybe you people will have some idea too, still, even if its just taking pictures of your screen and translating with your mobile phone, to me right now seems good enough.
EDIT: Okay, I've tested it further. Sadly most of the text in less than ideal location is not recognised properly. The apps I tried cant handle it good enough. At best it can translate the popup messages with "screen translator" for Windows (and tell me sample english project is not supported by trial)