You can translate your fields and their values in the Translation tab of any field. You can add target languages to be used in translations in the Event dashboard -> Settings -> Languages.
Translating field values
You can translate everything about the field, including the label (name of the field displayed to the participants), placeholder, tooltip, and values (in the case of select fields, for example).
To translate your fields, open the field in the Fields manager module -> Translation tab. Add a target language, enable the edit mode, and add the translations.
Adding target languages
Translating fields