Hello JOLY FLORENCE,
Thank you for reaching out and sharing the issue you’re facing with the language change module. I sincerely apologize for the inconvenience this has caused.
It’s possible that the Helix Framework setup might require some additional configurations compared to a standard Joomla site. To ensure everything is correctly configured for a multilingual site, please refer to the detailed documentation available here: Helix Framework Multilingual Site Setup.
If you’ve already followed these steps and the issue persists, please let me know, and I’ll be happy to assist you further.
Best regards