Custom Voiceset Not Working properly

Hello, I am trying to create a custom voiceset using sounds from GOG Icewind Dale 2 sound to try to use it in IWEE.

I know there are soundset mods but as far I am concerned all are in english and I would like to make in spanish. So I am trying on my own.

1) First I rename one soundset files from IW2 following the convention and move the files to /lang/es_ES/sounds/

It works in the chracter creation but when I start a new game the character has some missing sounds (specific I found missing the selected sounds) while others are playing like actions or dying.

2) THe I try this tutorial https://forums.beamdog.com/discussion/8868/heres-how-to-add-custom-sound-sets/p4 and use the DLCTP and create a CHARSND.2da file in the override folder.

But I've started a new game and the same problem again.

I've been searching the forum and I can't find what I can do. Could someone give me a hint so I can create my soundset?