Didn’t occur to me to use .byline {display:none} in style.css. Thanks. Managed to do it. Habits. In older themes I would just edit each php. THis is much more efficient as I only have to change one thing instead of making child content.php, content-single.php, etc.
Didn’t use PoEdit before but will try. Maybe its better if I translate everything instead of copying .php files to child theme and doing the translation there.
Will start a new topic next time. You are right, plenty of useful things for others.