British English translations for Posts have historically been created via manual content duplication from the English source.
What happened
When I published two new English posts, WPML automatically created British English (en-GB) versions of those posts — despite the following:
"Translate Everything Automatically" is OFF on the live site
I did not manually duplicate or create the en-GB versions
No automatic translation engine was used
The problem
The auto-generated British English posts contain the wrong content. Instead of mirroring their actual English source posts, all en-GB posts received the title and content of an entirely different, older post: "Building Profitable Partnerships: A Partner-First Guide to Selling Video Telematics."
The two newer English posts are:
"Basic Hardware vs. Programmable Hardware: When Technical Capability Defines Business Return"
"The market still buys trackers as a cost. Leaders buy information."
Their en-GB counterparts both incorrectly display the title and content of post #3: "Building Profitable Partnerships: A Partner-First Guide to Selling Video Telematics."
Current WPML settings
Translation mode: Translate What You Choose (NOT Translate Everything Automatically)
Post Types Translation for Posts: Translatable — only show translated items
Default language: English
Secondary languages: British English, Spanish
What I need help understanding
Why were en-GB posts created automatically when "Translate Everything Automatically" is disabled and I did not initiate duplication or translation?
Why do the en-GB posts contain content from a different English source post rather than their actual linked English source?
Are the trid values in wp_icl_translations corrupted? I suspect the new posts were assigned to the wrong translation group, linking them to the older post instead of their correct English sources.
Additional context
This same behavior also occurred on a dev/staging copy of the site.
I am aware that English → British English is not a supported automatic translation pair since both resolve to the same base language. My normal workflow is to manually duplicate English content into en-GB via the Translation Dashboard.