Hello
Any layout in
Joomla CCK you may change in "Admin->Components->CCK->Layout Manager"
If you mean translate "Add Review" -
1. go to Admin->Components->CCK->Layout Manager
2. select "Blog post" layout
3. select "Add Review For Blog Post"
4. and to "Button name" - add your text
Please check attachment image
If you create Multi Language website - to 4 point - you need insert "Text Constant" - which you created in "Admin->System->Manage->Languages override"
If you mean you need Translate text "No one has posted reviews.."
Please go to:
"Admin->System->Manage->Languages override"
and create override for text constant:
COM_OS_CCK_SELECT_NO_REVIEW
Regards
OrdaSoft team