[Resolved] programmatically create a post only in a secondary language

Hmmm.

I am not sure that we support that scenario.

However, you could create the post normally then use the following hooks to update the just-created post with language details you prefer:

wpml_element_trid()
wpml_set_element_language_details()

More here:
https://wpml.org/documentation/support/wpml-coding-api/wpml-hooks-reference/#hook-1215366
https://wpml.org/wpml-hook/wpml_set_element_language_details/

Note. There may be other hooks that you may need to use. I am not a developer but I can orient you towards a solution. If you need more detailed help, I will need to refer you to a WPML Contractor.

In your original post, you said you only wanted to add the post in the secondary language.

I am a bit confused on your question.

The thought is that you would do the following:

1. Add a post normally in whatever way you do that.
2. Our filters will add the post to our icl_languages table
3. You would need to modify the icl_languages entry for the added post to have a different source language.

As I said, I am not a programmer - I can only give you an idea on how to proceed and to guide you through available hooks/filters.