I am currently developing a project which supports Right-to-Left languages, too. So far, with RTL support of Apple, I managed %80 of the project to support RTL. However I am stuck with UICollectionView.
For LTR Languages everything works fine as shown below:
However, when RTL is activated look below, the collection view is loading successfully but when it is trying to expand or in other words reload again, it acts like LTR again, i guess. I added slow motion gif in order to give you some information about the behaviour.
Any ideas why is this happening? Please not, I referred to this answer here, however it uses vertical scrolling, not horizontal.