Hi Chrysostomos,
Hope all is well
You didn't mention the version so I went with 8.0;
Available Languages for Cisco Unity Connection 8.x Components
Note 
Languages are not licensed, and Connection 8.x does not enforce a limit on the number of languages you can install and use. However, the more languages you install, the less hard-disk space is available for storing voice messages. In the Cisco Unity Connection 8.x Supported Platforms List (http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/supported_platforms/8xcucspl.html), information on the number of minutes of storage available on each server assumes that you have installed no more than five languages.
This section lists the languages in which Connection components are available.
Cisco Personal Communications Assistant (PCA)
Arabic-Saudi Arabia, Catalan, Chinese-Hong Kong, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, Finnish, French-Canada, French-France, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Personal Communications Assistant (PCA) Help
Arabic-Saudi Arabia, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese-Brazil, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Unity Connection Administration
English-United States, Japanese
Cisco Unity Connection Administration Help
English-United States
Cisco Unity Connection ViewMail for IBM Lotus Notes
Arabic-Saudi Arabia, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Unity Connection ViewMail for IBM Lotus Notes Help
Arabic-Saudi Arabia, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese-Brazil, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco ViewMail for Microsoft Outlook 8.5
Arabic-Saudi Arabia, Catalan, Chinese-Hong Kong, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, Finnish, French-Canada, French-France, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Unity Connection ViewMail for Microsoft Outlook 8.0
Arabic-Saudi Arabia, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Unity Connection ViewMail for Microsoft Outlook 8.0 Help
Arabic-Saudi Arabia, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese-Brazil, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Cisco Unity Connection Web Inbox (in Connection 8.5)
Catalan, Chinese-Hong Kong, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-United States, Finnish, French-Canada, French-France, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
System prompts
Arabic-Saudi Arabia, Catalan, Chinese-Hong Kong, Chinese-PRC, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-Australia, English-United Kingdom, English-United States, English TTY/TDD-United States, Finnish, French-Canada, French-France, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Text-to-speech engine
Arabic-Saudi Arabia, Chinese-PRC, Catalan, Chinese-Hong Kong, Chinese-Taiwan, Czech, Danish, Dutch-Netherlands, English-Australia, English-United States, English-United Kingdom, Finnish, French-Canada, French-France, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese-Brazil, Portuguese-Europe, Russian, Spanish-Latin America, Spanish-Spain, Swedish, Turkish
Transcription service for Cisco SpeechView
English-Australia, English-United States, English-United Kingdom, French-Canada, French-France, German, Italian, Portuguese-Brazil, Spanish-Latin America, Spanish-Spain
Voice-recognition engine
English-United States
Product documentation for administrators/installers
English-United States, Japanese
Product documentation for end users
Chinese-PRC, Chinese-Taiwan, Danish, Dutch-Netherlands, English-United States, French-France, German, Italian, Japanese, Korean, Portuguese-Brazil, Russian, Spanish-Latin America, Spanish-Spain, Swedish
Translated versions of the five Cisco Unity Connection user guides are available at http://www.cisco.com/en/US/products/ps6509/tsd_products_support_translated_end_user_guides_list.html.
http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/requirements/8xcucsysreqs.html#wp314537
Installing Additional Languages on the Cisco Unity Connection 8.x Server
http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/installation/guide/8xcucig030.pdf
Downloading Connection 8.x Language Files
Note This section applies to installing additional languages while installing a new Connection server. To add
languages to an existing Connection server, see the “Adding or Removing Cisco Unity Connection 8.x
Languages” chapter of the Reconfiguration and Upgrade Guide for Cisco Unity Connection at
http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/upgrade/guide/8xcucrugx.html. The
instructions are different.
To Download Connection 8.x Language Files
Step 1 On a computer with a high-speed Internet connection, go to the Voice and Unified Communications
Downloads page at http://tools.cisco.com/support/downloads/pub/Redirect.x?mdfid=278875240.
Note To access the software download page, you must be signed in to Cisco.com as a registered user.
Step 2 In the tree control on the Downloads page, expand Unified Communications Applications > Voicemail
and Unified Messaging > Cisco Unity Connection, and select the applicable Connection version.
Step 3 On the Select a Software Type page, select Cisco Unity Connection Locale Installer.
Step 4 On the Select a Release page, select the applicable Connection version. The download links for
languages appear on the right side of the page.
Step 5 Confirm that the computer you are using has sufficient hard-disk space for the downloaded files. (The
download file sizes appear below the download links.)
The filename for each language is uc-locale-
abbreviation>-
Step 6 Select the name of a file to download.
Step 7 On the Download Image page, make note of the MD5 value.
Step 8 Follow the on-screen prompts to complete the download.
Step 9 Repeat Step 6 through Step 8 for each Connection language that you want to install.
Step 10 For each downloaded file, use a checksum generator to confirm that the MD5 checksum matches the
checksum that is listed on Cisco.com. If the values do not match, the downloaded file is damaged.
Caution Do not attempt to use a damaged file to install software or the results will be unpredictable.
If the MD5 values do not match, download the file again until the value for the downloaded
file matches the value listed on Cisco.com.
Free checksum tools are available on the Internet—for example, the Microsoft File Checksum Integrity
Verifier utility. The utility is described in Microsoft Knowledge Base article 841290, Availability and
Description of the File Checksum Integrity Verifier Utility. The KB article also includes a link for
downloading the utility.
Step 11 Either copy the downloaded files to an FTP or SFTP server, or burn the files to CDs or DVDs. If you
burn discs of the files, note the following considerations:
• Use the Joliet file system, which accommodates filenames up to 64 characters long.
• If the disc-burning application that you are using includes an option to verify the contents of the
burned disc, select that option. This causes the application to compare the contents of the burned
disc with the source files.
• Label the discs “Cisco Unity Connection
Step 12 Delete the downloaded files to free disk space.
http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/installation/guide/8xcucig030.pdf
Cheers!
Rob
