If u mean to use the translation files the easiest (and only) i know is MTOOL, made by advent cirno, its on their patreon page. Quite easy to use just a lil bit annoying cuz u have to updapte it daily which takes like 2 minutes but still.
To use it u have to put the "trsData.json" file in the game folder and then use the "load translation data file" (the one u just moved) from the translate menu. This tool can MTL games by itself but is limited at like 3mb for free users which is usually enought for games with not a heavy plot, but oh boy this 4.6gb game laughs at that, hope this helps!.
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