I think, it’s works now :)

Your default location is defined by this block: assistantConfig: { latitude: 51.508530, longitude: -0.076132, },

change latitude and longitude value for your actual position
This website can help you to determinate it

For language change:

change the value lang: "en-US", (actually in english) in

profiles: { "default": { profileFile: "default.json", lang: "en-US", }, },

Change the lang value by your own.
You can determinate it there

Notes:

I’m not a magician, just a hobbyist programmer of this module ;) Read wiki for advanced config