The General settings configure your basic site preferences such as the Site Title and Tag Line, the WordPress Address and Site Address, the administrators email address and the date and time format, among other things.
The WordPress Address (URL) is the location of your main WordPress core files. The Site Address (URL) is the address you want to use for your site homepage. Usually these two URL’s are the same but they can be different if, for example, you have your WordPress files stored in a subdirectory.
When you install WordPress, you get the option to select the language that you’d like to use within the Dashboard. After installation, if you’d like to change the language, you can select this using the Site Language dropdown at the bottom of the page.