Because I can understand Japanese, French, and Spanish, I was doing a challenge where I'd play the games and try to complete the dex in the language matching the region. So my Kanto mons' language of origin is Japanese, Unova English, Kalos French, etc.

What should I do for Gen 10 since Indonesian's not an option? Default to English because it's the lingua franca? Default to Japanese because it's the original language of the series? Something else?