Can you tell me how to write/say, "People for Others" in Latin?
According to Wiktionary and Etymonline, the word "people" derives from the Latin word populus. So it seems fitting to use the word populus.
One translation would be:
Populus pro aliis. (People for others.)
The word "populus" is a collective noun that means people. The word "aliis" is the ablative plural form of the adjective "alius, alia, alium".
The adjective "aliis" is used substantively in this context to mean "other people".