Often JPN exclude Elemenal because many there are English only speakers and don't know/refuse to use the strat or placements accepted by the JPN community. It's moreso that JPN (I am one) prefer to actually be able to communicate with each other for harder things like EX and Savage.

Not to mention that no one wants to be embarrassed by not being able to respond or speak in English. Also, since PF are for practice and DF for clear in JPN, communication is even more important to learn those fights.