Magento provides a translate default language in front-end through csv file. You can change as per below mentioned steps:
Open your Magento Root directory and go to ROOT/app/locale/en_US directory. In that directory you have to .csv file which you can do the translating. The Mage_catalog.csv contains the translations of all the files that use the ROOT/app/code/core/Mage/Catalog/classes/ and ROOT/app/design/front-end/default/default/locale/en_US/translate.csv template files.
You can also find Mage_adminhtml.csv file, which handles more of the admin translations.
If Magento translations are failed, you should have to check all the settings for store in admin panel. You can see if there is something wrong with your locale directory.
Steps for checking all the settings.
- Login Magento Admin Panel
- Click on system menu and click on configuration options.
- Select the configuration scope of the store view in the upper left corner.
- From the general configuration page, expand the Locale Option for selection.
- Under the Local options, set Local to the new language for the store view .
Click on Save Config button, to save entire settings.
