Unified Messaging language packs allow an Exchange 2010 UM server to speak additional languages to callers and recognize other languages when callers use ASR or when voice messages are transcribed. UM language packs contain:

• Pre-recorded prompts in the language of the UM language pack. For example, "After the tone, please record your message. When you’ve finished recording, hang up, or press the # key for more options."
  
  
• Grammar files in the language of the UM language pack that are used by a UM server to look up the names of given users in the directory.
  
  
• Text-to-Speech (TTS) translation so that content (e-mail, calendar, contact information, etc.) can be read to callers in the language of the UM language pack.
  
  
• Support for Automatic Speech Recognition (ASR), which allows callers to interact with UM using the voice user interface (VUI) in the language of the UM language pack.
  
  
• Support for Voice Mail Preview, which allows users to read the transcript of voice mail messages in a specific language from within a supported e-mail client such as Outlook or Outlook Web App.
  
  

The UM language packs that are included with Exchange 2010 contain pre-recorded prompts, TTS conversion support for a specific language, and in some cases, support for ASR. In multiple-language environments, you may have to install additional UM language packs because some callers prefer to be prompted in a different language, or because they receive e-mail in more than one language. You must install multiple UM language packs to support the ability for the Unified Messaging server to read an e-mail message that contains more than one language, because the TTS conversion system must be instructed which language to select based on the text of the message that will be read. If the Unified Messaging language pack hasn't been installed, the e-mail message will be illogical and incoherent when it's read back to the user. Installing the appropriate language pack enables the TTS engine to read e-mail and calendar items to the Outlook Voice Access user by using the correct language and also provides the language-specific pre-recorded prompts for Unified Messaging. In some cases, they may also provide support for ASR.

Note:
The TTS engine converts text to speech but doesn't convert from speech to text. UM-enabled users can send an e-mail message that has a voice file attached to another user. However, they can't create and send a text-based e-mail message to another user.

When you install a language pack, the installation program does the following:

1. Copies the language prompts that will be used to configure UM dial plans and auto attendants.
   
   
2. Allows the TTS engine to read messages when Outlook Voice Access users access their Inbox.
   
   
3. Enables ASR for speech-enabled UM dial plans and auto attendants for the language installed.
   
   
4. Enables Voice Mail Preview for clients in other languages.
   
   

You can add UM language packs using the Setup.com command or run the <UMLanguagePack>.exe installation program after you've downloaded the UM language pack from Exchange Server 2010 SP2 UM Language Packs. However, you can remove a UM language pack only by using the Setup.com command. There's no Exchange Management Shell cmdlet that you can use to add or remove languages from a Unified Messaging server. For more information about how to install a UM language pack, see Install a Unified Messaging Language Pack on a UM Server. For more information about how to remove a UM language pack, see Remove a Unified Messaging Language Pack from a UM Server.

Note:
By default, when you install Exchange 2010, the U.S. English language (en-US) will be installed and can't be removed unless you remove the Unified Messaging server role from the computer.

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The following table lists the Unified Messaging language packs that are currently available. It also lists the installation file name for each UM language pack and the culture ID for the UM language.

UM language pack installation file names and culture IDs

Language	Country/Region	Culture ID	Installation file name	Availability
Catalan	Spain	ca-ES	UMLanguagePack. ca-ES	Download available
Chinese (Hong Kong)	China	zh-HK	UMLanguagePack. zh-HK	Download available
Chinese (Simplified)	China	zh-CHS	UMLanguagePack.zh-CN	Download available
Chinese (Traditional)	Taiwan	zh-TW	UMLanguagePack.zh-TW	Download available
Danish	Denmark	da-DK	UMLanguagePack.da-DK	Download available
Dutch	Netherlands	nl-NL	UMLanguagePack.nl-NL	Download available
English	Australia	en-AU	UMLanguagePack.en-AU	Download available
English	Canada	en-CA	UMLanguagePack. en-CA	Download available
English	India	en-IN	UMLanguagePack. en-IN	Download available Caution: Deploying the Exchange 2010 SP1 English (India) (en-IN) Unified Messaging language pack in organizations that include Exchange Server 2007 servers running on Windows Server 2003 will cause the Exchange 2007 servers to fail. Further details are contained in this Microsoft Knowledge Base article.
English	United Kingdom	en-GB	UMLanguagePack.en-GB	Download available
English	United States	en-US	Included with installation of the Unified Messaging server role	Download available
Finnish	Finland	fi-Fl	UMLanguagePack.fi-Fl	Download available
French	Canada	fr-CA	UMLanguagePack.fr-CA	Download available
French	France	fr-FR	UMLanguagePack.fr-FR	Download available
German	Germany	de-DE	UMLanguagePack.de-DE	Download available
Italian	Italy	it-IT	UMLanguagePack.it-IT	Download available
Japanese	Japan	ja-JP	UMLanguagePack.ja-JP	Download available
Korean	Korean	ko-KR	UMLanguagePack.ko-KR	Download available
Norwegian (Bokmal)	Norway	nb-NO	UMLanguagePack.nb-NO	Download available
Polish	Poland	pl-PL	UMLanguagePack.pl-PL	Download available
Portuguese	Brazil	pt-BR	UMLanguagePack.pt-BR	Download available
Portuguese	Portugal	pt-PT	UMLanguagePack.pt-PT	Download available
Russian	Russia	ru-RU	UMLanguagePack. ru-RU	Download available
Spanish	Spain	es-ES	UMLanguagePack.es-ES	Download available
Spanish	Mexico	es-MX	UMLanguagePack.es-MX	Download available
Swedish	Sweden	sv-SE	UMLanguagePack.sv-SE	Download available

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The Exchange 2010 Unified Messaging server role is installed with a set of default audio prompt files. These audio files contain the recordings for Outlook Voice Access menus, voice mail greetings, and numbers that are used by Exchange Unified Messaging. The audio files are played by a Unified Messaging server to incoming callers, both internal and external. Many of the audio files are default prompts that provide the users of the Telephone User Interface (TUI) and Outlook Voice Access the information that they need to move through the TUI and the Voice User Interface (VUI). The prompts are located in <Program Files>\Microsoft\Exchange Server\V14\UnifiedMessaging\Prompts\<language>. The prompts used by the Unified Messaging server to help callers move through the menus shouldn't be replaced or changed.

When an additional UM language pack is installed, the pre-recorded prompts for that language will also be installed. After a UM language pack is installed, the pre-recorded prompts for that language can be used by UM dial plans and auto attendants.

Unified Messaging relies on the Text-to-Speech (TTS) engine. TTS functionality is provided by the Microsoft Speech Server service. The TTS engine reads and converts written text into audible output that can be heard by a caller. The TTS engine reads and converts the following items in a user's mailbox:

• E-mail and voice mail message bodies, subjects, and names
  
  
• Calendar item bodies, subjects, locations, and names
  
  
• Personal contact names
  
  
• Users' default voice mail greetings
  
  

Note:
After a user has recorded personalized voice mail greetings, the TTS version of the voice greetings are no longer used.

In addition to TTS, Automatic Speech Recognition (ASR) support is included in Exchange 2010 Unified Messaging. ASR functionality is provided by the Microsoft Speech Server service. ASR enables callers to use voice commands to interact with the Unified Messaging system. Using ASR, callers can move through menus and interact with items from their individual mailboxes, including messages, personal contacts, and calendar. ASR support is included with each language pack.

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You install a UM language pack on the Unified Messaging server using Setup.com. After you install the new language pack on the Unified Messaging server, the language associated with the language pack will be added to the list of available languages that you can use. You can view the languages that have been installed using the UM Settings tab in the Unified Messaging server properties in the Exchange Management Console or using the Get-UMServer cmdlet in the Exchange Management Shell.

When you install the UM language pack, the files that are used by the TTS engine and the pre-recorded prompts for the chosen language are copied and made available for users who connect to the Unified Messaging system.

Each UM dial plan that's created contains a default language setting. The UM dial plan language setting is needed because Unified Messaging may have to use TTS conversion or play a standard audio prompt for Outlook Voice Access users when they access their Exchange 2010 mailbox. You don't have to select a default dial plan language.

When you first install Exchange 2010, U.S. English will be the default language, and the only available language option for your dial plan. After you install a UM language pack on a Unified Messaging server, the language associated with the language pack will be listed as an available option when you configure the default language for the dial plan.

The default language is important to callers. When an Outlook Voice Access user calls in to the Unified Messaging system, the language setting chosen is based on the language setting configured in Outlook Web App that was set when the user first signed in to the mailbox using Outlook Web App. Unified Messaging then compares the language set in Outlook Web App to the list of available languages on the dial plan with which the user is associated. If there is no suitable match for the language, the default UM dial plan language will be used. Sometimes, you may have to set this language as the default language. For example, if you have a dial plan that contains only users from France, you may want to change the default language setting on the dial plan to French. For more information about how to change the default language for a UM dial plan, see Configure the Default Language on a UM Dial Plan.

By default, because UM auto attendants are associated with a UM dial plan when they are created, they use the default language setting of the associated UM dial plan. However, this setting can be changed after the UM auto attendant is created.

The UM auto attendant language setting is needed because Unified Messaging may have to use TTS conversion or play a standard audio prompt to a caller. Unified Messaging doesn't check whether the language of custom prompts for the auto attendant matches the language setting on the auto attendant. However, as a best practice, make sure that the language setting of the auto attendant matches the language of the custom prompts. Otherwise, the caller may hear the system shift from one language to another.

Being able to change the UM auto attendant language setting is also useful if you need several different language-specific auto attendants for callers. For more information about how to configure language settings on a UM auto attendant, see Configure the Language Setting on a UM Auto Attendant.

Important:

To ensure that all Unified Messaging features are available in the UM language packs you install, you must install the Exchange 2010 Client and Server Language Pack on each UM server in the dial plan. If you don’t install the Client and Server Language Pack, some features may not work as expected. Some features, like Voice Mail Preview, will work in the language that is configured on the dial plan but when only the UM language pack is installed. However, features like Outlook Voice Access and user interface text won’t work in the language by the user without having both the UM language pack and the Client and Server Language Pack installed. To download and install additional client and server language packs on servers in your organization, see the Microsoft Exchange Server 2010 SP1 Language Pack Bundle.

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