Background of the issue:
I have a Hungarian language site that was running fine, and I am trying to make it multilingual using WPML. We encountered issues with post categories, specifically with new 'news' posts being marked as 'uncategorized'. I discovered that the default language for our basic post category is set to English instead of Hungarian.
Symptoms:
The 'news' (hirek) category is not available for categorizing new posts, and the default language for post categories is incorrectly set to English.
Questions:
How can I change the default language of the post category from English to Hungarian?
that is because you already have a category in other languages, you created it in EN language and then translated it to others.
You would need to delete all of the translations of that category and then translate from the HU category language to all others. Make sure to name them differently to later know which one is which.
