French Unwanted Sign That Appear When We Unlike On The Stream

Hello,

First of all, please follow this french url --> https://www.yannanderson.com/fr/friends

Then, you can see with attached picture " 1.jpg " that when we like a post, you can see the text "J'aime" in french that is the same as "Like" in english. Attached picture " 2.jpg " show you that I click the "J'aime // Like" button. But as you can see with attached picture " 3.jpg " if we press once again the "j'aime" button, for dislike it, the text is not displayed "J'aime" but "J\'aime".

Do you know why this sign " \ " appear when we dislike it ?

Best Regards