Unable to have Catch Box in French

Hi Sakin, I'm using a child of Catch Box and I want my site to be in French. I copied the fr_FR.po from the main theme, made a few changes with Poedit, created a language folder in my child and put in the modified fr_FR file. I left intact the fr_FR in the main theme. It doesn't work. So I deleted my child's language folder and replaced the original fr_FR in the main theme with the modified one. Doesn't work either. I'm a bit discouraged because my site must go live tomorrow. Everything else works fine except for language. This is a major issue as you can imagine. Thank you for your help.