FleetCart/Themes/Storefront/resources/lang/en/checkout.php

<?php

return [
    'checkout' => 'Checkout',
    'account_details' => 'Account Details',
    'add_new_address' => 'Add New Address',
    'billing_details' => 'Billing Details',
    'default' => 'Default',
    'you_must_select_an_address' => 'You must select an address.',
    'please_select' => 'Please Select',
    'create_an_account_by_entering_the_information_below' => 'Create an account by entering the information below. If you are a returning customer please login from the top of the page.',
    'shipping_details' => 'Shipping Details',
    'special_note_for_delivery' => 'Special note for delivery',
    'payment_method' => 'Payment Method',
    'shipping_method' => 'Shipping Method',
    'no_payment_method' => 'No payment method is found.',
    'payment_instructions' => 'Payment Instructions',
    'i_agree_to_the' => 'I agree to the',
    'terms_&_conditions' => 'Terms & Conditions',
    'place_order' => 'Place Order',
];