Create a 12GB RAMDisk (using applications like ImDisk or SoftPerfect). Copy your entire StarCraft 2 Data folder (roughly 11.8GB) into the RAMDisk. Then, create a symbolic link (symlink) from the original install location to the RAMDisk.
: Ensure your language in the Battle.net Settings matches the language selected inside the StarCraft II options menu exactly. starcraft 2 preparing game data extra quality