You have the ability to send different mail templates, in one batch, based on your sample list field.

Let's say you have one single sample list with two languages: French and English. 

These values are stored in a field named "Language" with value=1 for French and value=2 for English: 

You need to create two mail templates:

• A French one, named "1.html"
• An English one, named "2.html"

Then, upload the necessary templates on the working directory of your survey.

On Sample list properties > Mail Templates tab, enter the path for the template files like this:

So, the path to your survey working directory uses [Language].html

You can also use a sample list field for a dynamic subject of your Mail:

Every dynamic field should be between square brackets []. 

You will have a warning at each time you validate the sample list properties, when on "Mail Templates" tab.

That is normal, as well as the lack of Preview.

Now, you can start your email campaign with the all the contacts getting the appropriate templates: