Hi @Yevhen2103,
Welcome to the Community!
This is a great question about sending content in a user’s preferred language.
If you are just looking to send all subscribers from Germany, Austria or Switzerland messages in German, you can create the following segment based on the users IP location:
Properties about someone > Country > equals > Germany
OR
Properties about someone > Country > equals > Austria
OR
Properties about someone > Country > equals > Switzerland
If needed, more details on creating a location-based segment can be found here.
From here, you can send campaigns to these segments that contain German content. For flows, you can show/hide certain blocks based on a property about the recipient, such as their location or preferred language. This will allow the same email to be send to users in different languages based on the data you collected about them in Klaviyo.
To make it easier on yourself moving forward, you can also collect someone's preferred language in sign-up forms. This is a more personalized way to confirm the subscriber will be receiving messages in their preferred language, regardless of geographical location.
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Hope this helps!
-- Ashley Ismailovski