之前也有人反馈过，目前等待开发。

@Simnovo said:

之前也有人反馈过，目前等待开发。

看来还是有点遥遥无期，谢谢解答

@jwing said:
Please distinguish between Simplified Chinese and Traditional Chinese in the poster classification settings.
In the Chinese mainland and Taiwan region, the same movie or TV drama may have different translated names, but currently, all the posters are classified together regardless of these differences.

No, it's still not possible.
I'm from Brazil and I have this problem. pt-PT and pt-BR.
Currently we can only select the language. Not the country.
But it's already part of To Do List's plans.
See here:
https://trello.com/c/pHOJdjPj/73-add-region-variant-to-image-languages
You can vote and/or follow the Trello card.