Blog "read more labels" for custom post types

I've been stumped on this for a while.

The sites I build always have a few different custom post types. Typically, they are things like: testimonials, galleries, etc.

Would it be possible to display a different "read more" phrase conditionally, per content type?

While searching the forum, I've located this code, which allows me to manually change the "read more" verbiage. But I couldn't figure out how to make it conditional to a post type. Taking it one step further, it would be cool to have a few conditional statements, IE: if testimonial, if gallery, elseif...

I appreciate any guidance you may have in this matter. Thank you!

if ( ! function_exists( 'generate_custom_blog_excerpt_more' ) ) :
	/**
	 * Prints the read more HTML
	 */
	add_filter( 'excerpt_more', 'generate_custom_blog_excerpt_more', 100 );
	add_filter( 'the_content_more_link', 'generate_custom_blog_excerpt_more', 100 );
	function generate_custom_blog_excerpt_more( $more ) {
		$generate_settings = wp_parse_args( 
			get_option( 'generate_blog_settings', array() ), 
			generate_blog_get_defaults() 
		);
		return '<div class="read-more-button"><a href="'. get_permalink( get_the_ID() ) . '">test</a></div>';
	}
endif;