I created a folder “lang” in my theme child folder where I put my own fr_FR.mo and fr_FR.po to change the translation of “You might like also” in French.
But since the last update, it doesn’t work anymore. How can I do to change the translation ?
Sorry for the very late reply and thanks for your patience, I assume that you followed these steps because you said that it doesn’t more “anymore” implying that it did work once for you. So to test on my localhost I followed these steps and changed my FR language file “Vous aimerez peut-être aussi” to “Tu pourrais aussi aimer” and this worked correctly for me using a child theme with Enfold v4.8.1 & WordPress 5.7
So perhaps your Poedit edit didn’t save correctly, or your functions.php code in not correct, or you have a plugin or cache that is overwriting the change? Please review these and try again.