en_tn_condensed/psa/009/008.md

He will judge the world with righteousness ... he will execute judgment for the nations with fairness

These two clauses express the same meaning. (See: rc://en/ta/man/jit/figs-parallelism)

He will judge the world with righteousness

Here "the world" refers to all the people in the world. Alternate translation: "He will judge all the people of the world righteously" (See: rc://en/ta/man/jit/figs-metonymy)