When will the update be finished?

[CPUB0T]

They likely don’t know either. Google is still reviewing the changes they submitted for the extension, and it’s unclear why it’s taking so long.

Here’s one of the most recent updates from the dev team:

Language Reactor extension

We know that some of you are currently unable to find our extension in the web store, and we apologize for the inconvenience. The issue is due to an update we made to the extension, which is currently under review by Google for day 6. Please be assured, the extension is on its way and we are doing our best to make it available to you as soon as possible. We appreciate your patience and understanding during this time. Thank you for your support! Language Reactor Team