I've to agree with Sierra Sonic ...
the team said something about "a jap soundpack will follow soon" ... and this was about 1 year ago ...
maybe there're just some missing sounds ... and FreeDoM gave it up ... I dunno, but I can ask
ESF is an english game ... so the default sounds would stay english
German soundpack
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just look my signature ... it finally got released (again) ... you can also use it if you don't know the german episodes ... most attacks are called like the english ones ... and you can just replace the weaponsounds (like SBC charging, sword .....), too ... I got a good rate in RSM (about 9,6/10) ... and as I know not only germans thought that it was good ...