Recurring events not creating language posts

We use recurring events to generate all the weekly events but it seems that it’s only creating the english versions and our Welsh versions aren’t being generated.
English events https://www.keepcardifftidy.com/community/
Welsh events https://www.cadwchcaerdyddyndaclus.com/cymuned/

Can someone help work out why this is happening?

The page I need help with: [log in to see the link]