Change the language of certain theme words

Hello, I would like to know where, in the theme, it would be possible to change the language of certain buttons. For example, I would like to change the “Read More” of the category pages to translate it into French. Likewise, I would like to modify the language of the sentence which presents the other related articles, at the bottom of each article “You May Also Like”, to also put it in French. Thank you very much for your help. see you.