Sub-Category Template Hierarchy Issue

Hello!

Let me preface this thread by saying I’ve read through and understand the Template Hierarchy business: https://developer.wordpress.org/themes/basics/template-hierarchy/

My issue: I have four (4) Parent Categories and eleven (11) sub-categories for each parent category for a total of about 44 total categories. These categories represent posts in two (2) geographic locations, in two (2) languages. I am able to filter all the posts by the Parent category and have already created four (4) separate Category-XXX.php files to give each page the proper header and menu.

THE PROBLEM: When I try to filter by a sub-category of a parent, the loop defaults back to index.php – which is basically unused on my site.

How do I tell WordPress that I just want the sub category to default to the parent category template? I only need four (4) different templates. The only solution I’ve found is to give every sub category slug its own category-XXX.php file, which would seem a little ridiculous when I only need four and not 40 different files.

Thoughts?! Please help! I really don’t want to to have to duplicate 40 files.

http://labourmarketinfo.com

Thanks!

Ryan