it will display in the language you have programmed or collected your responses.
Qualtrics do translations for survey , for dashboard, you have to contact support team.
you can translate the dashboard by using "Label Translate" option. You can find this option under the "Setting" tab. !
Please check the image.
Export the CSV file, fill in the translation in an appropriate language column and then import it.
Once, you have done with it, you can verify it by changing the "account language" from account setting.