Spanish seems to be the second most popular language on tapas followed by French, and if you want an idea of what that translates to... Well, you can just look at the stats for my comic they kind of speak for themselves...
This is the English version:
This is the French version:
Bear in mind in terms of invested readers I actually have way more French readers than English ones, it's just they're on webtoon where different language comics are completely segregated. I think in Indonesian you would have a lot more success posting that version on webtoon because there's a whole Indonesian community over there than on Tapas.