Posted by abelsromero on Apr 08, 2020; 3:33pm
URL: https://discuss.asciidoctor.org/localization-of-toc-title-figure-caption-tp7848p7850.html

This is what you need https://github.com/asciidoctor/asciidoctor.org/blob/master/docs/_includes/language-support.adoc.
Here you can find the references, you can copy/adapt the ones you need: https://github.com/asciidoctor/asciidoctor/tree/master/data/locale.

To simplify, you can have all required translations (within proper `ifeval::["{lang}" == "--"]` clauses) in a file, and just include it the articles setting the language like seen below.

= Title
:toc:
:lang: es
include::lang-values.adoc[]