Hello @ScottS1075. Thanks for coming into the Community. You are able to change the language in your account which will change the following areas of your campaigns/sign-up forms:
the footer text of your campaigns
the non-editable text on the Forward Email to a Friend Form
the buttons on the web sign-up form
However, the fields on your sign-up forms will remain in English. What I recommend is to check out our Marketplace where you may be able to find an integrated sign-up form product that will be able to have different languages available.
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