Hi @Hector Piza,
We were able to confirm that your scenario is part of the known issue that will be fixed with the next release of the Platform Server in early March (Platform Server 11.11.1).
Regarding the workaround, we have concluded that, for now, the approach you had of forcing a page to reload after setting the new locale is necessary to affect the table headers.
Thanks for sharing the issue and help us improve this capability.
Regards,
Vítor Teixeira