When you Publish an extension manually in Business Central you can select the language.
When you publish the extension via Automation API the language is everytime EN-US.

It would be perfect if you could define the language as well via Automation API access.
Needs Votes
Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future.

Best regards,
Business Central Team