The Greek in Acts 4:25 that is translated as “vain things” or similar in English is translated in the following ways:

• “as vain things plan together but in vain” (Chuj)
• “imagining many things which they were not able to do” (Morelos Nahuatl)
• “think up things that are not at all important” (Central Pame)
• “tried to do God bad but in vain” (Highland Popoluca)
• “that evil they think to do will never be carried out” (Mezquital Otomi)
• “think a lot about big things but can’t do them” (Tataltepec Chatino (Source for this and above: Viola Waterhouse in Notes on Translation August 1966, p. 86ff.)