I am trying to use ubercart with i18n.
I can't figure out how could I set up the catalog correctly. The specific use of taxonomy term inside URL path is not supported by i18n.

a) I correctly connected term/1 with term/2. I can switch between /hu/taxonomy/term/1 and /sk/taxonomy/term/2 with "Translations" block (used in i18n to switch between languages).
But it is impossible to switch between hu/catalog/1 and sk/catalog/2 which would be the correct functionality.

b) The subcatalog url contains the taxonomy term name also, but the term name may have special characters, so it is unusable as part of the url. It is not good to remove these special characters, the foreign word make no sense this way. It would be good if the special characters were converted to corresponding (equivalent) English letter.

c) There is also a problem with catalog name, as it is a name of one vocabulary, and as I see it is not translatable in i18n. Maybe I could try to translate it with l10n_client, which is not a wise solution, but it should work.

So it does not seems good from multilingual prospective, and I just only started experimenting with it.