If your company has only enabled the survey in 1 language, it's not possible to change the survey language.
However, if your company has enabled all or multiple languages, a language drop-down menu displays on the survey landing page. Selecting a survey language has immediate effect.
The survey will remember your language preference for the future, unless your company overrides it. Example: They bulk-update all employee language preference to the language of the country they're based in.
Peakon offers manager's the ability to translate comments to the language of their dashboard. The source language for each comment is each employee's survey language and it displays on the comment. Example: If you select Spanish as your survey language, even if you type your comment in English, a Translate from: Spanish option will display on the comment.