Make quakespasm display in-game messages properly in new expansions?

I am playing the new Dawn of the Machine expansion on quakespasm, and just like with other MachineGames expansions, in-game messages (e.g. "This hall is easy mode" or intermission text) are improperly displayed (e.g. "$mg3_start__normal_hint"). Everything else works perfectly fine, I just don't know what affects this.