Google is introducing its auto-generated ‘Smart Replies’ – in order to provide quick
responses based on machine learning in the YouTube Studio. This is an updated SmartReply
for YouTube, which will make the process straightforward for the creators to engage with
their communities efficiently. As of now, this will be available only for English and Spanish
video creators.

As mentioned by Google, “We are now excited to share an updated SmartReply…This model learns comment and reply representation through a computationally efficient dilated self- attention network, and represents the first cross-lingual and character byte-based
SmartReply model.”
Source: Socialmediatoday