Changer la valeur des champs personnalisés dans les emails

Hi,
Please could someone bring me a way out.

Here the code:

/**
* Add custom billing fields.
*/
add_filter( ‘woocommerce_billing_fields’ , ‘js_sora_add_billing_fields’ );

function js_sora_add_billing_fields( $fields ) {

$fields[‘billing_gender’] = array(
‘type’ => ‘select’,
‘label’ => __(‘Gender’, ‘sora’),
‘options’ => array(
” => __( ‘Select options’, ‘sora’ ),
‘1’ => __(‘Miss’, ‘sora’),
‘2’ => __(‘Mrs’, ‘sora’),
‘3’ => __(‘Mr’, ‘sora’),
),
‘placeholder’ => _x(‘Select options’, ‘placeholder’, ‘sora’),
‘required’ => true,
‘priority’ => 10,
‘class’ => array(‘form-row-first’),
‘input_class’ => array(‘wc-enhanced-select’),
‘clear’ => true
);

wc_enqueue_js( ”
jQuery( ‘:input.wc-enhanced-select’ ).filter( ‘:not(.enhanced)’ ).each( function() {
var select2_args = { minimumResultsForSearch: 5 };
jQuery( this ).select2( select2_args ).addClass( ‘enhanced’ );
});”
);

return $fields;
}

/**
* Update the order meta with field value.
*/
add_action( ‘woocommerce_checkout_update_order_meta’, ‘js_sora_field_update_order_meta’ );

function js_sora_field_update_order_meta( $order_id ) {
if ( ! empty( $_POST[‘billing_gender’] ) ) {
update_post_meta( $order_id, ‘billing_gender’, sanitize_text_field( $_POST[‘billing_gender’] ) );
}
}

How to change numeric values to text in emails only.
1 == some text
2 == some text
etc…

PS : I use shortcode [wec_order_meta key=’billing_gender’]

example : if the customer selects option 3
change ‘3’ to ‘Cher Monsieur’ / in emails

Results : [wec_order_meta key=’billing_gender’] {first_name} {last_name},
== Cher Monsieur Jhon Doe

I hope to have been clear

Regards