תהילים מט:ב פירוש: רש״י, אבן עזרא וMetzudat David

Hear this, all you peoples Because this psalm is based on people who rely on their riches, he says, “all you peoples,” for they all require admonition.

"Listen" - to the message he gives, that addresses all in whose nostrils G-d (lit. hashem, the name) blew the breath of life. Therefore, "listen all who dwell on Earth".

"All ye people" - because everybody needs this lesson.