Change text for read more and comments

I have website in Polish language, that's why I want translate all of the elements.

TODO:

• Translate button Read More
• Translate "No comments" (When is 0 comments to post, is displayed "No comments" but when I have at least one, I have correct information in Polish language)

My wordpress template: Savona

I don't know where can I find elements in files to change it. I upload image with informations from Source Browser:

Here

This is my post-content.php

<article id="post-<?php the_ID(); ?>"<?php post_class(); ?>>

<?php

if ( have_posts() ) :

    // Loop Start
    while ( have_posts() ) :

        the_post();

?>  

    <div class="post-media">
        <?php the_post_thumbnail('savona-full-thumbnail'); ?>
    </div>

    <header class="post-header">

        <?php

        $category_list = get_the_category_list( ',&nbsp;&nbsp;' );
        if ( savona_options( 'single_page_show_categories' ) === true && $category_list ) {
            echo '<div class="post-categories">' . ent2ncr($category_list) . '</div>';
        }

        ?>

        <h1 class="post-title"><?php the_title(); ?></h1>

        <div class="post-meta clear-fix">
            <?php if ( savona_options( 'single_page_show_date' ) === true ) : ?>
            <span class="post-date"><?php the_time( get_option( 'date_format' ) ); ?></span>
            <?php endif; ?>
        </div>

    </header>

    <div class="post-content">

        <?php

        // The Post Content
        the_content('');

        // Post Pagination
        $defaults = array(
            'before' => '<p class="single-pagination">'. esc_html__( 'Pages:', 'savona' ),
            'after' => '</p>'
        );

        wp_link_pages( $defaults );

        ?>
    </div>

    <footer class="post-footer">



        <?php if ( savona_options( 'single_page_show_author' ) === true ) : ?>
        <span class="post-author"><?php esc_html_e( 'By', 'savona' ); ?>&nbsp;<?php the_author_posts_link(); ?></span>
        <?php endif; ?>

        <?php

        if ( savona_options( 'single_page_show_comments' ) === true && comments_open() ) {
            comments_popup_link( esc_html__( 'No Comments', 'savona' ), esc_html__( '1 Comment', 'savona' ), '% '. esc_html__( 'Comments', 'savona' ), 'post-comments');
        }

        ?>

    </footer>

<?php

    endwhile; // Loop End
endif; // have_posts()

?>

</article>