Those that have you follow some sort of intensive or immersive course, what are they like, are they a con (i.e. not a pro)?
not a con but not the cheapest way to do it, can be more like a working holiday but depends how immersive
what language? (french in my experience)
edit: i haven’t done one but know people who have and know people who teach them
My French is satisfactorily at the level at which people will reply in French only if they know absolutely zero english