I watched the talk "Formatters: Make data human-friendiy" from WWDC 2020 and want to understand/reproduce the examples, especially for "How we can make well-formated lists"

Question: What do I have to change in my playground to reproduce the results of the examples.

// English Localisation
let items = [ "English", "French", "Spanish"]
ListFormatter.localizedString(byJoining: items)

let items1 = ["English", "Spanish"]
ListFormatter.localizedString(byJoining: items1)

let items2 = ["Spanish", "English"]
ListFormatter.localizedString(byJoining: items2)

// Spanisch Localisation
let itemsInSpanish = ["Ingleés", "Espñol"]
ListFormatter.localizedString(byJoining: itemsInSpanish)

let itemsINSpanish2 = [ "Espanol", "Ingles" ]
ListFormatter.localizedString(byJoining: itemsINSpanish2)

Thank you