What is Channel Translation?
If you are targeting respondents who do not speak English in your Channel, and you've already added translations for your survey in the Survey Editor Menu, then make sure to turn the Translation toggle on in your Channel, then select the Translation you want respondents in this Channel to see, e.g. Spanish.
If you are in the Consumer Panel Channel, the Translation should match the language you set for your channel (e.g. Spanish translation and Spanish language).
Just like Channel Language, you are permitted only 1 Translation per channel.