Hello!
For the multi-language functionality, we’ve seen our clients using WPML or Polylang, so you could go with on of these options. With these plugins you will be able to have e.g. yoursite.com/bet365 (content etc. in default language) and yoursite.com/de/bet365 (content etc. in German language) etc.
The GEOlocation is not related with languages. We use GEOlocation to show to the users if a Casino is available at their country or not, or to show different content based on the country of the visitor, etc.
Here you are the GEOlocation page: https://pokatheme.com/poka-geolocation-plugin/ (you don’t need to purchase the plugin if you have already purchased PokaTheme because GEOlocation is included in PokaTheme).