Help with gettex

[EnricMaio]

Hi everybody.

I'm new here, and my English is not the best, but I trust you'll understand me :-)
I'm a dummy, I don't know PHP, and I hope some of you will help me...

I would like to translate via WPML plugin a couple of words, but the text must be wrapped in gettext calls, and I have not idea how to do.
The words that I need to translate are "Published on" and "Last Updated on".

Here is the code:
 

add_filter( 'generate_post_date_output', function( $output, $time_string ) {
    $time_string = '<time class="entry-date published" datetime="%1$s" itemprop="datePublished">%2$s</time>';

    if ( get_the_date() !== get_the_modified_date() ) {
        $time_string = '<time class="entry-date published" datetime="%1$s" itemprop="datePublished">Published on: %2$s</time> | <time class="entry-date updated-date" datetime="%3$s" itemprop="dateModified">Last Updated on: %4$s</time>';
    }

    $time_string = sprintf( $time_string,
        esc_attr( get_the_date( 'c' ) ),
        esc_html( get_the_date() ),
        esc_attr( get_the_modified_date( 'c' ) ),
        esc_html( get_the_modified_date() )
    );

    return sprintf ( '<span class="posted-on">%s</span> ',
        $time_string
    );
}, 10, 2 );

That's all. I hope anybody has time to help me.
Thank you in advance.

Bye

[requinix]

gettext is a hook. What you want is the __ function. https://developer.wordpress.org/reference/functions/__/

Call it with the words to translate and stick the results into your $time_string.

[EnricMaio]

Thank you requinix.
I'm trying, but not success :-(
As I said I know notthing about PHP.
Anyway, thanks for your help.
I will try to investigate more.
Ciao

[requinix]

Post the code you tried so we can see what the problem is.