I tried it with both TVDB and TMDB and both work for me.
The only thing that changes between the 2 is the poster but everything is in English
His posters are even in Japanese
You are using the Plex TV Series agent, right?
If so and refresh metadata didn’t change anything maybe plex dance it
If you’re using the TVDB agent this could be an example of that agent not getting updates and bug fixes
