add_filter('woocommerce_stripe_woocommerce_addon_error','woocommerce_stripe_woocommerce_addon_error_overide',10,1) ;

function woocommerce_stripe_woocommerce_addon_error_overide($body){

    if($body['error']['type'] == 'invalid_request_error' ){

        $error = 'Please make sure you have entered the credit card number.';
    }

    if($body['error']['type'] == 'incorrect_number' ){

        $error = 'The card number is incorrect.';
    }
    if($body['error']['code'] == 'card_declined' ){

        $error = 'The card has been declined.';
    }
    if($body['error']['type'] == 'invalid_number' ){

        $error = 'The card number is not a valid credit card number.';
    }
    if($body['error']['type'] == 'invalid_expiry_month' ){

        $error = 'The card\'s expiration month is invalid.';
    }
    if($body['error']['type'] == 'invalid_expiry_year' ){

        $error = 'The card\'s expiration year is invalid.';
    }
    if($body['error']['type'] == 'invalid_cvc' ){

        $error = 'The card\'s security code is invalid.';
    }
    if($body['error']['type'] == 'expired_card' ){

        $error = 'The card has expired.';
    }
    if($body['error']['type'] == 'incorrect_cvc' ){

        $error = 'The card\'s security code is incorrect.';
    }
    if($body['error']['type'] == 'incorrect_zip' ){

        $error = 'The card\'s zip code failed validation.';
    }
    if($body['error']['type'] == 'card_error' ){

        $error = 'The card was declined from gateway.';
    }
    if($body['error']['type'] == 'missing' ){

        $error = 'There is no card on a customer that is being charged.';
    }
    if($body['error']['type'] == 'processing_error' ){

        $error = 'An error occurred while processing the card.';
    }
    if($body['error']['type'] == 'rate_limit' ){

        $error = 'An error occurred due to requests hitting the API too quickly. Please let us know if you\'re consistently running into this error.';
    }

    return $error  ;

}