Public service anouncement: as expected (since the beta 8 release already and announced above) this extension is affected by a breaking change in beta 9 and will require some changes to be compatible.
I recommend not installing the current version at all on beta 9 as it might mess up with the new translation logic.
You can follow the GitHub issue here: flagrow/linguist8
I'll try to take a look in the next few weeks. You may contact me directly if you'd like to sponsor the update to get it sooner 😉
Or if someone wants to have a try at a PR let me know so we don't start two different updates.
I'm adding the incompatible tag here in the meantime.