What is the difference between Amim and Le'umim?
Malbim (4): Le'umim have a common creed. They will rejoice, sing and tell openly.
What is the meaning of "Tishpot Amim Mishor"?
Rashi: You will judge them for merit.
Radak: The nations that will come with Gog and Magog, You will judge them straightly, and then other nations will rejoice.
What is the meaning of "Tanchem"?
Rashi: You will conduct them in the straight path.
Radak: You led them to Eretz Yisrael to judge them there - "v'Haviosicha Al Harei Yisrael" (Yechezkel 39:2).
Malbim: They will see that even though they are in the land [of Yisrael], You guide them in the straight path and supervise over the land.