Remove default level cost text and replace with a custom one in order to format price based on level.

add-custom-multi-currency-level-cost-text-colum-to-memberlist.php

<?php 

/**
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 */

/**
 * Remove fee column and add a custom one to the Members List to show the multi currency level cost.
 *
 * @param  array $columns columns to be displayed.
 */
function my_memberslist_columns( $columns ) {
	unset( $columns['fee'] );
	$columns['custom_fee'] = 'Level Cost Text';
	return $columns;
}
add_filter( 'pmpro_manage_memberslist_columns', 'my_memberslist_columns');

/**
 * 
 * Add the custom (currency formatted) fee to the members list.
 *
 * @param  string $colname column being filled.
 * @param  string $item_id to get information for.
 */
function my_pmpro_fill_memberslist_col_company( $colname, $item_id ) {

	if ( 'custom_fee' === $colname ) {
		global $wpdb;
		$item = $wpdb->get_row( "SELECT * FROM $wpdb->pmpro_memberships_users WHERE user_id = $item_id ORDER BY id DESC LIMIT 1" );
		// If there is no payment for the level, show a dash.
		if ( empty( $item ) || (float)$item->initial_payment <= 0 && (float)$item->billing_amount <= 0 ) {
			echo esc_html__( '&#8212;', 'paid-memberships-pro' );
		}
		$fee = '';
		// Display the member's initial payment.
		if ( (float)$item->initial_payment > 0 ) {
			$fee .= pmpro_escape_price( pmpro_custom_formatPrice( $item->initial_payment, $item->membership_id ) );
		}
		// If there is a recurring payment, show a plus sign.
		if ( (float) $item->initial_payment > 0 && (float)$item->billing_amount > 0 ) {
			$fee .= esc_html__( ' + ', 'paid-memberships-pro' );
		}
		// If there is a recurring payment, show the recurring payment amount and cycle.
		if ( (float)$item->billing_amount > 0 ) {
			$fee .= pmpro_escape_price( pmpro_custom_formatPrice( $item->billing_amount, $item->membership_id ) );
			$fee .= esc_html__( ' per ', 'paid-memberships-pro' );
			if ( $item->cycle_number > 1 ) {
				$fee .= $item->cycle_number . " " . pmpro_translate_billing_period( $item->cycle_period, $item->cycle_number );
			} else {
				$fee .= pmpro_translate_billing_period( $item->cycle_period, 1 );
			}
		}
		echo $fee;
	}
}
add_filter( 'pmpro_manage_memberslist_custom_column', 'my_pmpro_fill_memberslist_col_company', 10, 2 );

/**
 * Add a custom format for the price of the level.
 *
 * @param  string $price price to be formatted.
 * @param  int $level_id level id to get information for.
 */
function pmpro_custom_formatPrice($price, $level_id) {
	$formatted = pmpro_formatPrice($price);
	//Level 3 return dollars, all the rest euros. Change this logic as needed.
	if ( $level_id != 3	 ) {
		return str_replace( '&#36', '&#8364', $formatted );
	}
	return  $formatted;
}