First, you need to create a Localazy account. You can do that here.
Then, install the plugin from the Strapi Marketplace (make sure you are using Strapi 4.0 or above!)
After you connect your Strapi and Localazy projects, set up the content transfer. Before the setup becomes available, you must enable localization for at least one Content-Type - collection or single.
Then, you can choose which fields from each Content-Type you want to transfer.
You can learn more in the article Introducing the Strapi localization plugin by Localazy
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