Pretty much all energy weapons would (or should) have a 'stun' setting (the slugthrowers would be the ones that state they are purely lethal) but there are 2 definite 'stun weapons': CS-12 Stun Master & Force Pike (the Shockball Glove could potentially be used to stun someone, but not sure)
Don't believe 'languages' have been implemented, just roleplay how you want (have seen a few roleplaying the need for a translator droid, not to mention all the Mando`ades floating around)
As Tiali said, most energy weapons should have settings ranging from stun to kill, unless explicitly stated otherwise. For example, most "hold-out" blasters only had a single setting, which was very powerful and thus considered illegal by most governments.
So, just add the DLT to the list of 'should haves', and maybe when Zhao finishes playing with combat testing he can work on giving players the option of shooting to kill or shooting to capture (probably will have to injure it a certain amount first, but could then switch to 'stun mode' so as not to inflict further injury)