i'm not sure what i did but i don't remember doing anything stupid,but something went wrong and now all my admin panel is looking weird.
the titles are all messed up. for example, instead of My Account,it says BOX_HEADING_MY_ACCOUNT. it's the same with all other parts of the admin panel. 75% of the words in my admin panel are similar style. e.g BOX_HEADING_CATALOG,BOX_CATALOG_CATEGORIES_PRODUCT S,etc.
what have i done wrong and how can i fix this?