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Hebrew translation doesn't seem to work

in Localization
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you might be better off putting the yaga definition in conf/locale.php
http://vanillaforums.org/discussion/26597/tutorial-how-to-change-wording-how-to-change-text-how-to-change-language-how-to-change-locale
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.
Thanks! The issue in the end was that I had to rename the file to he.php and put it in the locale folder.