"Children sleep early"

Translation: Watoto hulala mapema

[AGreatUserName]

Also Watoto wanalala mapema. There’s nothing that tells us that hu- is needed.

[LeslieWedd]

In all the habitual sentences do we need a context to decide if "hu" is to be used. An example. "During the rainy season there are many mosquitos so adjustments must be made. Children sleep early" could be considered habitual.
I am having difficulty classifying isolated sentences without context.
Of course if the lesson is called "habitual" then use habitual but this won't help in real life.