How to Change Atom's `navigator.language`

After tinkering a bit, I've finally figured out how to change the navigator.language! I ended up having to modify the libchromiumcontent.dylib bundled inside Atom.app...

$ cmp -bl {orig,ja-JP}/Atom.app/Contents/Frameworks/Atom\ Framework.framework/Versions/A/Libraries/libchromiumcontent.dylib

43700712 145 e    152 j

43700713 156 n    141 a

43700715 125 U    112 J

43700716 123 S    120 P

This is the value that is used for navigator.language. Once patched as above, navigator.language will return "ja-JP".