I had downloaded the HTML5 Blank WordPress Theme, I noticed a lot of functions within the function.php that use ' html5blank '.

Example: // Localisation Support
Code:
load_theme_textdomain('html5blank', get_template_directory() . '/languages');
What I want to know is, can I just go ahead and replace the ' html5blank ' with my domain name?

Example: // Localisation Support
Code:
load_theme_textdomain('mysite', get_template_directory() . '/languages');
Is it normal for people to ' Tweak, Modify or Change ' this and the functions to switch from ' html5blank ' to ones domain name?

Thank you