[Feature Request] Add translation option to add language for Next and prev buttons.

I was wondering is there any option to add i18n translation to at least translate buttons next and previous. Of course I can try to do it on my own. I know I can hardcode this oj file, but you know that this approach is not something that I want to achieve. Besides adding a language file is much easier for average user.

_Originally posted by @sysadmin-info in https://github.com/anvithks/hugo-embed-pdf-shortcode/discussions/24#discussioncomment-5377101_