Look up Egg Theory. It will blow your mind.

Basis becomes Bases Crisis becomes Crises Oasis Oases Echolalia Echolalies Etc Generally the vowel becomes an e

Illinois Illinoes

The first few episodes Mariner was written as hyperactive and overbearing to the point of being off-putting.

But they responded to feedback and wrote her differently going forward and seem to have made some edits to earlier episodes.

It might be worth seeing some later episodes once it got settled in.

I think Worf mentioned this in TNG