Filter blog categories by Section
I'm trying to output a list of of all Categories used within a specific blog section.
I've tried to use the following, but this outputs all the categories used in the entire blog (and not just the ones used in this particular section).
<?php perch_blog_categories(array( 'section' => 'en' )); ?>
I've found a couple of similar forum posts that seem to show that I may not be able to filter categories by section in this way (https://forum.grabaperch.com/forum/06-27-2016-blog-sections-filter-by-categories and https://forum.grabaperch.com/forum/03-30-2015-cant-get-perch-blog-categories-to-filter-by-section). Is this the case?
My use case is a blog in various languages, and each language will have its own set of Categories. Given that I need to show the categories in use by each language, what would you recommend as an approach? Would multiple blogs (this is a Runway project) and then filtering by blog be the best option here?
Many thanks in advance for your help.