In IT in Australia it is kaysh.
cache
noun 1. /kæʃ/ (say kash) a store of provisions, treasure, etc., especially one hidden in the ground.
2. /kæʃ/ (say kash) a store of food collected by some animals for the winter.
3. /kæʃ/ (say kash) a hiding place, especially one in the ground, for such provisions, treasure, etc.
4. /keɪʃ/ (say kaysh) → cache memory.
–verb (t) (cached, caching) 5. /kæʃ/ (say kash) to put in a cache; conceal; hide.
6. /keɪʃ/ (say kaysh) Computers to put into cache memory: this information is cached to increase speed.
[French, from cacher hide]