Customizing the 'Read More' text

Put this into your child theme functions.php, make certain that your child theme is active. 

/* Customize the 'Read More' text. */
// Remove parent theme filters.
function themo_child_remove_filters() {
    remove_filter( 'get_the_excerpt', 'themo_custom_excerpt_more' );
    remove_filter('excerpt_more', 'roots_excerpt_more');
}
add_action( 'after_setup_theme', 'themo_child_remove_filters' );
// Customize the 'Read More' when explicitly using excerpt
function themo_child_custom_excerpt( $output ) {
    if ( (has_excerpt() || themo_has_more()) && ! is_attachment() && get_post_type() != 'themo_room') {
        $output .= ' TEST1 … <a href="' . esc_url(get_permalink()) . '">' . esc_html__('Read More', 'bellevue') . '</a>';
    }
    return $output;
}
add_filter( 'get_the_excerpt', 'themo_child_custom_excerpt' );
// Customize the 'Read More' when using auto excerpts
function themo_child_roots_excerpt($more) {
    if (get_post_type() != 'themo_room') {
        return ' TEST2 … <a href="' . esc_url(get_permalink()) . '">' . esc_html__('Read More', 'bellevue') . '</a>';
    }
}
add_filter('excerpt_more', 'themo_child_roots_excerpt');