This apparent language shift is mainly due to Lon’s being trained on all language and not just modern American writing tied to post Hemingway ideals of brevity.

This apparent language shift is mainly due to Lon’s being trained on all language and not just modern American writing tied to post Hemingway ideals of brevity. Much of the language considered odd is standard British English, like the singular they. Also the use of wider vocabulary isn’t considered bad writing outside the Us where specificity is valued over simplicity.