Module title for Menu "Discover our menus"

Hi,
How can I translate Menu custom-module "Menu_discover our menus", whithout loosing the style ?
The very moment I translate it into "Menus_découvrez nos menus", I've lost the css style applied
what is to be used to have it on two lines like in the default model ?
thanks for any help

I could copy paste ""bigtitle" suffix__Second line" module title
and replace it in the "Menu__Discover our menu" module title to recover the 2 lines. But I still don't know which caracter is used to break the lines...

Doing that, I have another issue : text in the description appears only when I click the source code icon. If not, description seems empty.
Do you know what could be the problem ?
Thanks

Ok, I found that the problem comes from JoomlaCK editor.
I need another version of this editor if exists.
Regards