By default, WordPress comes with two basic types of content: Posts and Pages. These are called post types. However, many sites also feature custom post types. For example, a site could have Tour, Article, or Book post types. WPML allows you to translate these custom post types easily.
To be able to translate custom post types, you need to set them as Translatable in WPML. To do this, go to WPML → Settings and scroll to the Post Types Translation section. Choose one of the two Translatable options.
You can send your posts to be translated via the Translation Management Dashboard after setting them as Translatable.
If you use the Translate Everything translation mode, be sure to choose Translatable – only show translated items, and switch the Translate Automatically toggle to Yes. Then, decide in the popup if you want to translate existing content in this post type or only posts you create after this point.