Setting the Location Services (googlemap) language to ... auto detect?

Hi Team,

Just wonder if I can just leave "Configuration> Workflow> Location> Location Services> Language code" blank and let the google auto detect the browser language? I tried with blank and "auto" but seems it's not working as expected:

- "auto" > showing Chinese-TC all the time regardless of my Joomla language selection.
- leave it blank > showing English all the time regardless of my Joomla language selection.

I just wonder if I can let google to auto-detect the user's chosen language. Please show me some light and thanks.

Best regards,
Alfred