Language persistence error (Greek) in Windows 11 Home Single Language - Dell G3 3590

The system automatically switched to Greek and blocked all interface change options.
I am a user of the Single Language edition, and the base language pack seems corrupted.
I have tried to force the change through PowerShell and registry edits without success.
When attempting an 'In-place Upgrade' repair with a Portuguese/Spanish ISO, the system does not allow keeping applications because it does not recognize the current base language (Greek).

I am currently in the post-defense phase of my Ph.D. in Chemical Engineering. This technical bug is critical for me because it's affecting my access to specialized advanced modeling tools (Python) and process optimization data. I cannot afford a clean install as I must preserve my research environment and configurations.

freddyphdpuc de gmail