I have a lot of customers who want to give their end users a localised experience with AVD and W365. This means that they install language packs onto the Session Hosts and configure it either with GPO or scripts so end users will have their session in their own language.
I know from experience that working with language packs is not that easy. We are talking about Language (interface) pack and also about the Features on Demand like spell check, fonts, handwriting, text-to-speech etc. You need to download the correct versions, need multiple files and also some scripting knowledge to get it working.