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CJK language support for eDiscovery (Premium)

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Important

This article applies only to the classic eDiscovery experience. The classic eDiscovery experience will be retired in August 2025 and won't be available as an experience option in the Microsoft Purview portal after retirement.

We recommend that you start planning for this transition early and start using the new eDiscovery experience in the Microsoft Purview portal. To learn more about using the most current eDiscovery capabilities and features, see Learn about eDiscovery.

Microsoft Purview eDiscovery (Premium) supports double-byte character set languages (these include Simplified Chinese, Traditional Chinese, Japanese, and Korean, which are collectively known as CJK languages) for the following advanced scenarios in a review set:

Tip

If you're not an E5 customer, use the 90-day Microsoft Purview solutions trial to explore how additional Purview capabilities can help your organization manage data security and compliance needs. Start now at the Microsoft Purview trials hub. Learn details about signing up and trial terms.

Frequently asked questions

How do I create a search to collect items that contains CJK characters?

You can use CJK characters for keyword searches, keyword queries and search conditions when searching for content in eDiscovery (Premium). Searching for CJK characters is also supported when searching for content in Microsoft Purview eDiscovery (Standard) and Content Search.

We provide CJK support for all search operators and search conditions, including the boolean operators AND, OR, NOT, and NEAR.

If you're certain that content locations or items contain CJK characters, but searches aren't returning any results, select the query language-country/region icon Query language-country/region icon in Content search. and select the corresponding language-country culture code value for the search. The default language/region is neutral.

Can I search for multiple languages at once?

It depends on your search scenario.

  • When you query data in a review set in eDiscovery (Premium), you can search for multiple languages.
  • When you create a search to collect data, create separate collections for each language you're targeting. For example, if you are searching for a document that contains both Chinese and Korean, select Chinese for your first collection and select Korean for your second collection.

I don't see the query language-country/region icon to select a language for queries in a review set. How can I specify a query language in a review set search?

For review set queries, you don't need to specify a document language. eDiscovery (Premium) automatically detects document languages when you add content to a review set. This helps you optimize your query results in a review set.

Can I see detected languages in file metadata?

No, you can't see detected languages in file metadata.

Can I filter by document languages in a review set?

No, you can't filter, sort, or search by document languages in a review set.

Will this CJK release for review set scenarios affect any of my existing searches and review sets?

No, none of your existing searches and review sets will change. You don't need to reindex existing data, and search results for English text will be the same.

How do I change my display language to Chinese, Japanese, or Korean?

For information about how to change display language and time zone, see How to set language and region settings for Office 365.

Limits

  • OCR doesn't support CJK characters from image files
  • Email files (such as *.eml and *.msg) in Annotate view aren't supported for CJK languages.
  • Search hit highlighting in Text view isn't supported for CJK languages.
  • The Relevance module used to analyze data doesn't support CJK languages.
  • Query-based holds aren't supported for CJK languages.