While there isn't a known specific translation of "to lift", we do have a word for "to raise" - manaeragon - and given that David J. Peterson is sparse when it comes to coining new terms, it seems likely that it would be the same word. "All men must lift" or "all men must raise" would thus be Valar manaeris. For an answer that is definitely correct though, I would advise to ask DJP directly.