Understanding Klaviyo Reviews language and translation settings

Estimated 3 minute read

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Updated Aug 5, 2025, 12:00 AM EST

Table of contents

• You will learn
• Set a default widget language
• Set language based on each visitor’s browser settings
• Set language programmatically (requires custom code)
• Additional resources

You will learn

Learn about language, translation, and locale settings for reviews widgets. These settings determine which language your widgets and the review submission form appear in.

Set a default widget language

By default, Klaviyo Reviews widgets and the review submission page use English for built-in text. To select a different language:

1. Navigate to the Reviews tab in Klaviyo.
2. Click Reviews settings.

1. Select General.

1. In the Select language menu, choose your preferred language.
2. Click Save changes.

Updating the language for Klaviyo reviews affects all of the following:

• Review submission page
• Onsite widgets
• Star rating widget
• Review summary widget
• Review list widget
• Product reviews widget
• Featured review carousel widget
• SEO / All reviews widget

You cannot update the language setting for individual widgets using this method. The selected language applies to all widgets, including those that are already live on your site, and changes are applied immediately after you save.

Updating your language for Klaviyo reviews does not translate custom questions, customized widget or submission-page text, flows, sign-up forms, consent pages, or the content of customer-submitted reviews. Manage translations for your own content separately. Customer-submitted reviews stay in the language they were written in.

Set language based on each visitor’s browser settings

Klaviyo can use a visitor’s browser language preferences to select a language for reviews widgets and the review submission page. To turn this on:

1. Navigate to the Reviews tab in Klaviyo.
2. Click Reviews settings.

1. Select General.

1. Turn on the Set language based on visitor preferences toggle.
2. Optional: check the option If available, use the visitor's shipping location to set language.
3. Select Save changes.

Reviews widgets can only be translated into the languages shown in the default language dropdown menu. If a visitor’s browser language is not supported, your default language is used instead.

Shipping location can only be used on the review submission page. If a visitor’s shipping location is unavailable, the language falls back to their browser settings. If browser settings are not available, the language defaults to the language selected in your Klaviyo Reviews settings.

Set language programmatically (requires custom code)

This option is only available for custom-coded implementations of Klaviyo Reviews. If you used a drag-and-drop editor to install your reviews widgets, this option is not available to you.

If you have access to a developer, you can implement a custom-coded language selection process for reviews widgets.

All reviews widgets accept a lang parameter, which accepts a 2-letter ISO 639 language code. You only need to apply this parameter to 1 review widget on a page. Once set for 1 widget, all other widgets will use this parameter as well.

When implemented correctly, the language parameter in reviews code looks like this:

<div id=“klaviyo-reviews-all” data-id=“{{product.id}}” lang=“en”></div>

The lang parameter and single-page apps

This setting is fetched upon injection of the widget code. In single-page applications, live changes to the lang parameter will only take effect if the widget placeholder element is unmounted and remounted.

Additional resources

• How to customize content based on language
• How to customize review widgets
• How to customize the review submission page

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