This tutorial shows how to add language unique banners in osCommerce 2.2 RC2a store.
First of all locate the banner image file name. Using the Browser Developer Tool check the banner image name (you can also right click on the image and select Properties).
Create several banners with different content (one per language), save each using same file name but place the files into different language folders in the includes/languages/your_language/images directory
Open includes/header.php file and using the image file name search for the code where it is used. Use the search tool in your editor (CTRL+F)
Check the video tutorial below to perform necessary changes in the php file.