Here's a list of all the significant updates that has been made to the website, sorted from newest to oldest.
The list of updates for the generators, if they have them, are listed in their page.
The help page for the Undertale Text Box Generator has been updated a lot, and all that wasn't translated to spanish before it is now. Also, the gray background effect that showed up when you hovered your mouse over a sprite has been replaced with a gray border that surrounds the sprite, both in there and the public character list.
You're reading a specific update. To see all of them go to the news page.