In my case, appeared a message indicating that some installation was missing, and if want to do it now. I did.
After that, I've checked the "language" tab and the "regional format" tab. In my case they contained mixed data: the system was configured in english, but the language appeared to be spanish. In the regional formats, the same: spanish as the date and currency configuration: I've changed both to english and restarted.
SOLVED (at least in my case).
What I've done:
Open system settings -> language support
In my case, appeared a message indicating that some installation was missing, and if want to do it now. I did.
After that, I've checked the "language" tab and the "regional format" tab. In my case they contained mixed data: the system was configured in english, but the language appeared to be spanish. In the regional formats, the same: spanish as the date and currency configuration: I've changed both to english and restarted.
Apparently this solved the issue.