Bitcoin is 16-17 years old, logarithmic growth make this frame a space in time where plenty of evolution happened. Cultural differences and people coming from different experiences with Bitcoin will call it differently. We also know about same written word meaning different things in different languages. Same happen with sounds.

So the inverse is also true, different words and sounds sometimes refers to the same archetype.

People can call the smallest bitcoin denomination as they wish, the important fact is that we use it.