In WL, we use the term "bob" to refer to animated game graphics other than terrain tiles, workers, buildings and other immovables (stones, trees, etc.), in other words, "critters", the animals that wander about the game map.
Here is an excerpt from the synonyms section of the Wikipedia article about sprites:
BOB's, more often BLOB's or 'Blitter Objects', popular name for graphics objects drawn with the dedicated graphics blitter in the Amiga series of computers, which was available in addition to its true hardware sprites.
I don't think any of our coders are still, if ever, working on Amiga's, but "bob" is a short, catchy phrase and fits how we use it in WL.
Edit: - because "bob" is actually a technical acronym, I don't feel it has to be translated, but then again I am a native English speaker.
I see little people.