Some strings are not translated at all:
CImage.php:253 - 'Wrong fields for image [ '.$image['name'].' ]'

And some strings is incorrectly formated:
CImage.php:256 - self::exception(ZBX_API_ERROR_PARAMETERS, ('Image').' [ '.$image['name'].' ] '.('already exists'));
CImage.php:372 - self::exception(ZBX_API_ERROR_PARAMETERS, ('Image').' [ '.$image['name'].' ] '.('already exists'));
and others..