Use the gettext WordPress filter to change any translatable string.

gettext-filter-multiple.php

<?php
/**
 * Change text strings
 *
 * @link http://codex.wordpress.org/Plugin_API/Filter_Reference/gettext
 */
function my_text_strings( $translated_text, $text, $domain ) {
	switch ( $translated_text ) {
		case 'Sale!' :
			$translated_text = __( 'Clearance!', 'woocommerce' );
			break;
		case 'Add to cart' :
			$translated_text = __( 'Add to basket', 'woocommerce' );
			break;
		case 'Related Products' :
			$translated_text = __( 'Check out these related products', 'woocommerce' );
			break;
	}
	return $translated_text;
}
add_filter( 'gettext', 'my_text_strings', 20, 3 );

Hello, is it possible to apply this function so that the strings according to the language with WPML? Could you say how to apply it? Thank you.

I'd recommend avoiding this filter, if possible, especially if it's used in several places through code, cause:
IMPORTANT: This filter is always applied even if internationalization is not in effect, and if the text domain has not been loaded. If there are functions hooked to this filter, they will always run. This could lead to a performance problem. (source: https://developer.wordpress.org/reference/hooks/gettext/#more-information )
Depending on situation, sometimes it's better to place modified template file to theme's folder (if plugin allows, like woocommerce), or use a special filter (if plugin allows)