I explained what is happening to weather in this thread. It is related. The English Language Fix is only part of the issue. It is simply how the programmers are handling their implementation of Weather Volumes on the Client Side triggering this. I have my own weather systems in Unity, UE4, NWN 1 & 2, and Skyrim. All function the same and work in a fully networked environment (NWN 1&2, Unity, UE4). I immediately saw saw how they implemented their weather system along with how the material works in CE (making things wet/shiny).
It does make a difference which mode the game is in (Server/SP) but it is in reference to the translations for the GUI…but…somehow they have encapsulated lots of other variables under this umbrella. By mistake? Or on purpose? Not sure to be honest. Definitely needs to be re-written though…unfortunately…this would be a big one.
Info/Pics Here: