Erratic i think should sims 3 insane rename just like sims 4

Insane and erratic are not synonyms. I'm not even really sure why they changed it to erratic in TS4. Anyway, changing such a minute detail would be a huge waste of EA's time. Plus, TS3 has 3 traits in the same vein (Insane, Unstable, and Neurotic) and surely one of those or a combination of them would suffice.

@Emily4331 I think it may be preparing for adding new traits
Maybe someday romantic will rename to flirty. In TS3 flirty is tend to flirt, hopeless romantic is tend to stable relationship. Similarly, Over-emotional is tend to from the heart, dramatic is more of put on airs. Loner is really unsociable, shy just literal meaning. Family-oriented is attach importance to family, nurturing is "senior" type.
Snob and diva is kinda similar in TS3, but diva have a more common name in TS4: self-absorbed. Paranoid and neurotic also not synonymous, paranoid is morbid skeptical, neurotic is easily nervous