voice pack/bns buddy

[Xiia Qingyue]

so i want to use a voice pack and would like to know how polished are they exactly, are there any missing SFX when i install a japanese or korean voice pack? are there missing audio files at bosses for example (for some mechanics etc) what happens when there is no appropriate japanese voice, does it automatically use english or is there silence? on a second note i would also like to ask if using bnsbuddy is allowed or not? will i get banned for it? i only want to use it for the voice pack. if i could also get a confirmation from a mod or someone who works at ncsoft it would be perfect.