Set up multi-language for forms, navigation, custom instructions in form headings and homepage widgets
Add "Translation" button in Reorder popup besides each field/menu item and when someone clicks on it, it would drop itself down with option to add translations for available languages.
For custom instructions, display a language dropdown in the top right corner under Customize instructions tab. Admin can select the language and add content for custom instructions.
For widgets, move the Reorder feature to a popup and replicate the translation feature from Navigation tool so people can translate the widget headings.