Translating the user experience of S-Sign is simple. Currently, only Spanish and German translations are available to download; this process is explained in the article below. However, if you want to define your own translations, add the following URL after "salesforce.com" in your browser:
To use the translations we provide, begin by importing either the Spanish or German translation template. To do this, create a new template. You can set whatever values you want for "Related to Type" and "Template Format," as these will be overwritten when you import the translation template.
Next, navigate to the template editor and paste in the code from one of the links below, then click Save & Close.
Once you click Save & Close, the template record should look like this.
Notice that Available for Use and Initially Visible have been unchecked, since this isn't a template that can be used for document generation; it's simply providing the translation for the S-Sign user experience.
Next, you need to add the following parameter to the S-Docs button you will be using with S-Sign (replace Spanish for German if using the German translation):
In this example, we'll add it to the S-Docs button for the Contact object. Navigate to Setup by clicking the cog in the upper right of your screen, then go to the Object Manager tab. Click your object.
Then, navigate to the Buttons, Links, and Actions tab. Find your S-Docs button and click Edit.
Add the parameter to your button.
Click Save, and you're all set! The S-Sign user experience will now be translated.