The text files of the game are encoded:
HolyKnightRicca_v102en\Game\HolyKnightRicca_Data\StreamingAssets\Language
I would love to play it in my native spanish by the way.
Conclusion from trying to replace JAP v1.0.5 language files with ENG v1.0.3 language files:
To be exact, the files in these sub-folders are only the translated language files for the
User Interface;
ENG Version 1.0.3: Game\HolyKnightRicca_Data\StreamingAssets\Language\en
JAP Version 1.0.5: Game\HolyKnightRicca_Data\StreamingAssets\Lang\ja
To get a Version 1.0.5 with ENG User Interface, and JAP game dialogue:
I overwrote the contents inside Game\HolyKnightRicca_Data\StreamingAssets\Lang\ja for JAP Version 1.0.5, with the contents of Game\HolyKnightRicca_Data\StreamingAssets\Language\en from ENG Version 1.0.3.
Game story dialogue/H scene dialogue is
definitely not included in there, and contained elsewhere.
After overwriting the contents of the ADV Folder/ACB Files/AWB Files under Game\HolyKnightRicca_Data\StreamingAssets for JAP 1.0.5 with the contents from ENG 1.0.3, and failing to notice any change;
I suspect this file, which is NOT replaceable, contains the translated dialogue:
Game\HolyKnightRicca_Data\data.unity3d
If my guess is correct, short of unpacking that file from ENG 1.0.3 to extract the dialogue content, and repack the extracted dialogue content into the same file from JAP 1.0.5, there would be no other way to get official translated ENG game dialogue for 1.0.5, other than get the official copy of ENG 1.0.5.
Ninja Update For Keen Eyes - Game Maker Hopefully Less Sad:
Check attached "Patch-Example.png" and "Ninja.txt"