jooml 2.5 ma ho trovato e risolto grazie si riferivano a queste voci:
Ho trovato riscontro nella lingua inglese
COM_USERS_CONFIG_FIELD_SENDPASSWORD_LAB EL="Send Password"
COM_USERS_EMAIL_REGISTERED_WITH_ACTIVAT ION_BODY_NOPW="Hello %s,\n\nThank you for registering at %s. Your account is created and must be activated before you can use it.\nTo activate the account click on the following link or copy-paste it in your browser:\n%s \n\nAfter activation you may login to %s using the following username and the password you entered during registration:\n\nUsername: %s"