The back translation translates the target text back to the original language. A back translation allows you to compare translations with the original text for quality and accuracy. Back translations help to evaluate equivalence of meaning between the source and target texts.
This is an easy way to check the accuracy of the translation, and adjust the original text to get more understandable translation result.
Comparison of the back translation to the original text is sometimes used as a quality check on the original translation.
Although the back translation doesn't always provide the same translation result due to the asymmetric sentence structure in different languages, this feature may give you additional benefit to make sure your text is understandable.
How to enable Back Translation
You can enable the back translation window by marking the checkbox "Back translation" on the Translator application.