OnePlus introduced a new facet of its OxygenOS called Instant Translation during its last product launch. It allows a phone to generate automatic captions during live video chats. This function has finally been added to new Open Betas for the 7, 7T, 7 Pro and 7T Pro.
https://www.notebookcheck.net/OnePlus-debuts-its-Instant-Translation-feature-in-the-7-and-7T-series-latest-beta.458637.0.html