I am in a similar situation with my TCL Roku TV (65r617}.
Originally, WiFi suddenly failed to see any networks. After troubleshooting, I did a factory reset. Now the remote will not operate, other than power. The TV is still stuck on the language selection menu.
I tried to pair the remote with fresh batteries repeatedly.
I suspect that the TV's WiFi receiver has failed, but surprised that the remote can't work via IR for the initial setup.
I am having the same trouble. Did you figure out how to fix this?
@Psyrog , if your tv isn't responding to the remote, you can view the front of your remote through a cell phone camera to see if the IR is actually luminating. (For some reason you can see that through a phone's camera.).
That would clarify if the remote's not working, or the tv's sensor failed.
Or, are you saying you have (or had) a wifi problem? Are you stuck on a setup-language screen? How/why did you get there?
There is a factory-reset pinhole button on the back of the tv. Your tv's manual will explain how to use it (google your tv model to find the manual). I'm sure there are videos showing how to do it, probably applicable to all models.