How can I do that?
You will need LibreOffice for it. There are some csv files in games folder located in "LustfulSpiritHunt\Lustful Spirit Hunt_Data\StreamingAssets\". These files contains all text lines used in the game. Open a file, on Text import box make sure character set it Unicode - UTF 8. You can edit text in third column. Make sure you don't edit anything in first row or column.