How to stop the Divi theme from loading Google fonts [closed]

wp_dequeue_style() should help you. You should dequeue style and enqueue your fonts.

wp_dequeue_style('et-core-main-fonts');
wp_enqueue_style('your_fonts_handle', 'path_to_your_fonts');

Or redeclare function with your fonts.

et_core_load_main_fonts() {
    $fonts_url = et_core_get_main_fonts();
    if ( empty( $fonts_url ) ) {
        return;
    }

    wp_enqueue_style( 'et-core-main-fonts', esc_url_raw( 'path_to_your_style' ), array(), null );
}