Hi Edward,

This is really Joomla configuration rather than being related to a particular template.

You don't need any extensions installed to make a multi-lingual site with Joomla 3. You can use the native multi-language.

The default language for the site is set in the language manager. In the language filter plugin you can change the behaviour for new vistors to set if they see the default language or the language of their browser.

To stop the language switcher always going to the homepage then you need to set up menu item associations by turning the option on in the filter plugin and then relating the different menu items to the same page in the other languages.

There always needs to be a default menu, category and template assigned to all languages as a fallback.

For the underscores, in the zentools module there is an option in the image source settings called 'File name separator character
' which you can change to _ to have them replaced by spaces.

Regards,

Rob