Where can I set the list of available languages?
You can do so in Extensions / Languages / Content Languages tab.
Does it translates Joomla! content?
No, ZOOlingual focus only on ZOO content and it is compatible with 3rd party language managers.
Is a language switcher module provided?
No, ZOOlingual relies on the Joomla! inbuilt switcher or of a 3rd party language manager one.
Does it supports category ordering by the translated name?
No, for all languages the items are sorted by the default language.
Why an Item view is redirected to a Category view when switching language?
It's a limitation of the Joomla! language switcher. A possible solution is using a 3rd party language manager.
Why when searching Items by name in a specific language it returns results from other languages?
It's a known limitation and currently there is no workaround.
It is compatible with frontend editing?
It is not, the translations must be done in the backend.