1. Select Preferences from the Messenger menu in the main window.
2. In the Language category, select English from the pull-down list.
(If English is a 'new' language you are downloading on Messenger, it will have to install, so be patient. Restart Messenger when the download completes.)
When you start back up, the language will be switched to English.
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Verified answer
Open Yahoo Messenger; then,
1. Select Preferences from the Messenger menu in the main window.
2. In the Language category, select English from the pull-down list.
(If English is a 'new' language you are downloading on Messenger, it will have to install, so be patient. Restart Messenger when the download completes.)
When you start back up, the language will be switched to English.
http://help.yahoo.com/tutorials/ms10/im_setup3.htm...