In japanese: meisekimu
In portuguese: “sonho lúcido”
in Filipino (Visayan) there’s a word for lucidity, as in easy to understand: ‘kaamag’ or you could say ‘kasanag’. i don’t think many people use these words any more.
I wrote that in japanese lucid dream is meisekimu. Here are the characters: (if your computer can read them ) 明晰夢
CROATIAN:
lucidan san…l
lucidan-lucid
san-dream;
or in plural:
lucidni snovi.