Where can I translate "Latest Coupons"?

Hello,

On homepage, we have the <h3> title “Latest Coupons”. My trouble is that I don’t find where can I translate it?

I’ve searched in the translation page (wp-admin), nothing, and everywhere in the source code. The only place where I found it was on “_reset.php” but well, I don’t want to reset my theme 😐

Anyone knows where can I change it?

Thanks for your help.
Bertrand (France)