How can I get excel to display multiple languages.

Hi I work for an online business and we sell items on ebay and amazon.

We download thousands of orders every day and sell items world wide.

We download the orders straight to excel but if the customers address in foreign alphabet, excel will replace the letters with symbols ie- "£$$%%".

Is there a way I can get excel to display multiple languages? I have looked at the language packs but seems quite expensive at £20 per language.

Thanks

Colin