Larian isn't small studio. They employ over 130 people, that’s Bethesda Game Studios level. They do voice acting for over 1M words using cast of around 80 actors - those are not some cheap folks, they hire well known actors. Their budget on voice acting is on Bioware's games level. For only small portion of this budget on voice acting they could do 5 additional localizations. If they don't want to do this localizations by themself, they could outsource it e.g. to local publishers.
