It is a dead end.
In February 2019, Capcom pushed to all platforms. This update fundamentally changed how the Vita loaded text strings. It encrypted the lang_ja files using a new RSA key. The existing English patch (v0.95) relied on decrypting the old file structure. After version 9.00, applying the patch caused the game to freeze on the "Now Loading" screen. monster hunter frontier z ps vita english patch patched
This is the ultimate "patch." You cannot patch a corpse. The PS Vita version requires a constant handshake with Capcom’s authentication servers. Once those servers died, the game became a digital brick. Even if you had the perfect English translation, you cannot log in. Short answer: No. It is a dead end
That is why the announcement of a fan-made English patch felt like a miracle. Rumors of an English patch began circulating on GBAtemp and Reddit around late 2017. A loose collective of translators (operating under names like "Team F" and "MHF-Vita") claimed to have reverse-engineered the Vita’s asset archives. It encrypted the lang_ja files using a new RSA key
The patch required a hacked PS Vita (firmware 3.60 or 3.65 Enso) running rePatch or reFood plugins. Players would download the base Japanese game (3.5GB via PKG or NPS), then drop the patch files into ux0:rePatch/ This method overwrote the Japanese text assets with English ones without touching the game’s core executable.