This is something that has been bothering me for years. Why does Episerver render the Catalog UI using the Name property rather than the DisplayName property? The Name property isn't translatable, while the DisplayName property is.
We have customers with editors all over the world who have painfully been forced to learn the Swedish names of products and categories, just because the catalog was created in Swedish. And similary, if the catalog was created in English, it's not given that everybody knows all the English translations by heart.
Why not use the translations instead to render the tree? Just like CMS does?
The only reasoning I can see for this is 1) legacy... 2) legacy and 3) there might not be a Displayname in the current languge, but then a fallback to Name could be made and indicating that it is "untranslated" (just like CMS does with grey italics).