When editing a part, there is a Target Language dropdown selection in the part properties
The Target Language field adds the ability for localization to NetCommunity pages.
If the website user’s primary language for the Internet browser is selected to the same language in the Target Language field, the part appears on the web page. If the browser is selected to a different language, the part does not appear. If the part applies to all languages, leave the default "All" in the field.