Yes, you can modify them as much as you like.
Yes, we provide a .po file for each theme, and you can use it to translate the theme into your desired language
Theme documentation and tutorials are publicly available on our website. For further theme support, our support forums and knowledge base are available to customers after the purchase of a theme.
We don’t have a set schedule for releasing new themes. We believe in quality over quantity, and improving our existing themes is just as important to us as releasing new themes.
Yes, you can set widget of Footer, Page sidebar & Blog sidebar etc.
Most WP plugins work just fine with our themes. That said, there are thousands of plugins, and there’s no way to guarantee they’ll all function properly with our themes. If you have a problem, we’ll do our best to help you resolve it or find an alternate plugin with the same functionality.