As of early 2026, there is no comprehensive fan-made patch that translates all in-game text (cards, story, and menus).
In the absence of a patch, the community developed several workarounds to make the Japanese version playable for English speakers: cardfight vanguard lock on victory english patch work
The short answer is:
Tools like Google Lens allow for real-time translation of Japanese text on the 3DS screen, which is helpful for reading new cards or specific mission requirements. As of early 2026, there is no comprehensive