Following are a number of back-translations as well as a sample translation for translators of Joshua 1:15:

• Kupsabiny: “until they also get their land. And then/at that time, God has given them rest like he has given to you. After that, go home to your land which Moses gave you on the east side of the river Jordan.” (Source: Kupsabiny Back Translation)
• Newari: “As long as the land west of the Jordan that the Lord your God is giving them is not yet fully conquered you must be the ones going ahead of them. Only after LORD have given rest you, will you be able to return to the land Moses the servant of the LORD gave you east of the Jordan."” (Source: Newari Back Translation)
• Hiligaynon: “until they will-receive the rest from the LORD the same as you have-received, and they can-possess the land which the Lord our (incl.) God is-giving to them. Then you (plur.) may now return here to the east side of Jordan, to possess this land which was-given to you (plur.) by Moises the servant of God.’” (Source: Hiligaynon Back Translation)
• English: “until they are able to live there safely/peacefully, as Yahweh has enabled you to do. You must help them until after they have conquered all the people in the land that Yahweh, your God, is giving them. After that, your soldiers may return to live in this land that Moses gave to you here on the east side of the Jordan River.’” (Source: Translation for Translators)