The Tamil in PS-1 is a bit different from Everyday Tamil. I believe some of it is Chentamizh, an older version of the language. Did Aish dub for herself this time? I needed the Hindi versions of the song lyrics. Even the Malayalam version wasn't of much help.
With Ash, she is good at words but the problem is with the accent.
If you see her Tamil movies her words are perfectly lip sync but when she talks outside there is an atrocious accent.
Case in example when she spoke in Kannada and Tulu for an event being her mother tongue the accent was so bad. While Sunil and Shilpa had it bang on