Hello, Magda.
As for your first question, see whether this thread can help: Paging through items in collection.
As for the second question, see whether this thread can help: User account panel translation. You might also want to check Locale Switcher or https://github.com/Daniel-KM/Omeka-plugin-Multilanguage plugins, they will let you offer more than one language to your users.
Hope this helps.