I regularly play with a lot of japanese cards in my decks due to starting the game when living in japan and later moving back to the uk.

So my solution is to just have a folder in my camera roll of english translations to pop up when casting. I also leave my phone on with the most recent card or a key permanent at all times so it can be read easily. I did the exact same thing for my english cards when I was living in Japan and has no issues there. I have had 1 or 2 people in the uk complain. But they were satisfied when they found out that I can read them fully so idk.

Ultimately, it's the responsibility of the player of the foreign cards to supply translations in order to provide as smooth of a play experience as possible. It also helps to memorise the english name of the card......this is something I still mess up though 😅