This is mostly just sticking to the original Japanese dialogue from what I understand. She has been a trans character in other regions since the Gamecube era, and they're finally re-adding that to the localized versions. I love it personally. Vivian was one of the very first Transgender characters I experienced in media as a kid in the 2000s, and she's portrayed in a really lovely way I think. Very positive and usual within the world itself. I'm excited for a new generation to hopefully grow up with TTYD!
Excited to pick it up tomorrow, if only to support the series because like
@Jerroddragon said, we need more Classic-style Paper Mario in our lives!