If you want to be precise it would be: "Swift for Tensorflow", a project lead by Lattner, while working at Google, as part of the Tensorflow project (published on tensorflow.org and part of the tensorflow github organization, which are two official channels). Presented at Google IO 2019 [0] as "Swift for TensorFlow is a platform for the next generation of machine learning that leverages blablabla...".

I stand with my "pitched by Google" :)

[0]: https://www.youtube.com/watch?v=3fJsqGHhlVA

With zero presence on the Tensorflow 2020 conference, not even an honourable mention on the overview blog post about the state of nation regarding TensorFlow.