Consider:
I am working from a mac and Safari, when a compressed file is downloaded it is automatically unzipped but I think this was affecting the package since I had to unzip it again and the original file was going to a garbage can, because this time I went to the trash can. and moved it; and use that original file and it worked without any problem.
I leave the link where the package goes.
https://crowdin.com/project/suitecrmtranslations/es-ES#
Download the latest version not stable and it worked.
I hope it helps you as it helped me.