WordPress Theme

Can I use Codestar framework free version in wordpress theme to submit themeforest? any suggestion please?

Have you checked the license?

I check the license, but I don’t understand anything.

From here - GitHub - Codestar/codestar-framework: A Simple and Lightweight WordPress Option Framework for Themes and Plugins in License part:

You can bundle the framework ( both free and premium ) in your free theme/plugin that you publish inside WordPress.org theme/plugin directory or in premium theme/plugin that you sell on your own website or in marketplaces like ThemeForest. This framework is licensed 100% GPL.