I believe Brazil has a non-insignificant Lutheran population, as there were many German settlers there. Of course not all Lutherans are liberal...
Also I believe a bunch of the indigenous people in Guatemala are Methodist as their missionaries were pretty prevalent there, but I'll assume they're nowhere near as liberal as northern Methodist. But yeah there are mainline Protestants in Latin America.
Also it's not too uncommon here for Hispanics to be ELCA, not saying that most or a majority are, but it's common enough so that it's not considered weird or unusual. ELCA works with a lot of immigrants groups so some of them end up converting, and they get a decent number of first or second generation American converts too.
I was under the impression that a lot of Indigenous Guatemalans were mostly Pentecostals/Evangelical Protestants.
