As the Nintendo Switch titles are capable of distributing wonder cards tied to more than one language, this category is not localized.
Do note that, the wonder cards are not stored on the saves for Sword & Shield, Brilliant Diamond & Shining Pearl, and Legends: Arceus.
However, there are some events (such as PC events in Japan) that distribute cards with descriptions, Original Trainer and nicknames only in Japanese.
The Nintendo Switch is region free. Hence region isn't a factor for the redemption process.
Useful information regarding all entries
As wonder cards (.wc8/.wb8/.wa8) themselves are not stored in the save for this game, players cannot directly inject the gifts into your save to claim them there.
1) players can drag the .wc8/.wb8/.wa8 to the left side of PKHeX to generate a Pokémon
2) players can inject the wonder cards into their BCAT (a news/updates/event directory the Switch uses) and claim free gifts. Information here.