I'm using FileIO to import a text file, after which I process it in certain
ways and use FileIO to export the text to a new text file.

This works fine with ASCII text, but I get gobbledygook when importing a
UTF-8-encoded text file.

Does FileIO need to support UTF-8 for this to work as intended? (And does
it support UTF-8?) If not, can you suggest a workaround?