In our example, we would like to add French as a new language for our customers, the steps are shown below:

• Copy english.php (found in /modules/addons/myrskpvs/lang) to your new language name - for French, it will be french.php
• open french.php file
• Modify the English sentences to French
• Save the file

Now when the customer selects his language (French), it will use french.php to display the sentences in French. If a customer selects a language which you did not create, it will fall back automatically to English.