Following are a number of back-translations as well as a sample translation for translators of 1 Chronicles 16:19:

• Kupsabiny: “God was saying these words when the people of Israel were still few
  and they were still foreigners/visitors in that land of Canaan.” (Source: Kupsabiny Back Translation)
• Newari: “At that time you were few in number —
  very few indeed —
  and [you] were foreigners
  in the land of Canaan.” (Source: Newari Back Translation)
• Hiligaynon: “Long-time-ago there were only very few people of God,
  and they were just strangers in the land of Canaan.” (Source: Hiligaynon Back Translation)
• English: “He said that to them when there were only a few of them,
  a tiny group of people who were living in that land like strangers/that belonged to other people;” (Source: Translation for Translators)