How to determine if a word has an extended character?

I have a file which contains just one word. My task is just to find
out if the word has any extended character. Thats all.

I can use regex, but am not able to find out a regex pattern for
extended character. Any hints?


For example, if the file content is: sample, then the Perl code prints
false; and if the file content is samplé, then the Perl code prints
true.

Thanks.
.

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