How to add reCAPTCHA into Twenty Fourteen comments.php

Hello all,

I am having horrible issues with incessant spam comment posts!

I already have Google reCAPTCHA set up, and I have successfully integrated it into my contact form (Contact Form 7) with the text “I am not a robot” appearing just above the submit button. However, I have been unable to discover a way to include the reCAPTCHA into the comments.php portion of my theme, Twenty Fourteen.

Is there a way to include code directly into the comments.php (or perhaps custom CSS) to include the reCAPTCHA into all comment forms. I am using a child theme of Twenty Fourteen and the standard comments.php is as follows

<?php
/**
 * The template for displaying Comments
 *
 * The area of the page that contains comments and the comment form.
 *
 * @package WordPress
 * @subpackage Twenty_Fourteen
 * @since Twenty Fourteen 1.0
 */

/*
 * If the current post is protected by a password and the visitor has not yet
 * entered the password we will return early without loading the comments.
 */
if ( post_password_required() ) {
	return;
}
?>

<div id="comments" class="comments-area">

	<?php if ( have_comments() ) : ?>

	<h2 class="comments-title">
		<?php
			printf( _n( 'One thought on “%2$s”', '%1$s thoughts on “%2$s”', get_comments_number(), 'twentyfourteen' ),
				number_format_i18n( get_comments_number() ), get_the_title() );
		?>
	</h2>

	<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : ?>
	<nav id="comment-nav-above" class="navigation comment-navigation" role="navigation">
		<h1 class="screen-reader-text"><?php _e( 'Comment navigation', 'twentyfourteen' ); ?></h1>
		<div class="nav-previous"><?php previous_comments_link( __( '← Older Comments', 'twentyfourteen' ) ); ?></div>
		<div class="nav-next"><?php next_comments_link( __( 'Newer Comments →', 'twentyfourteen' ) ); ?></div>
	</nav><!-- #comment-nav-above -->
	<?php endif; // Check for comment navigation. ?>

	<ol class="comment-list">
		<?php
			wp_list_comments( array(
				'style'       => 'ol',
				'short_ping'  => true,
				'avatar_size' => 34,
			) );
		?>
	<!-- .comment-list -->

	<?php if ( get_comment_pages_count() > 1 && get_option( 'page_comments' ) ) : ?>

	<nav id="comment-nav-below" class="navigation comment-navigation" role="navigation">
		<h1 class="screen-reader-text"><?php _e( 'Comment navigation', 'twentyfourteen' ); ?></h1>
		<div class="nav-previous"><?php previous_comments_link( __( '← Older Comments', 'twentyfourteen' ) ); ?></div>
		<div class="nav-next"><?php next_comments_link( __( 'Newer Comments →', 'twentyfourteen' ) ); ?></div>
	</nav><!-- #comment-nav-below -->
	<?php endif; // Check for comment navigation. ?>

	<?php if ( ! comments_open() ) : ?>
	<p class="no-comments"><?php _e( 'Comments are closed.', 'twentyfourteen' ); ?></p>
	<?php endif; ?>

	<?php endif; // have_comments() ?>

	<?php comment_form(); ?>

</div><!-- #comments -->

[Moderator note: code fixed. Please wrap code in the backtick character or use the code button.]

Thank you very much in advance for any help you may provide, and please let me know if you need anything additional!