Find all accented words (diacriticals) using grep?

Question

I have a large list of words in a text file (one word per line) Some words have accented characters (diacriticals). How can I use grep to display only the lines that contain accented characters?

Answer 1

The best solution I have found, for a larger class of characters ("What words are not pure ASCII?") is using PCRE with -P option:

grep -P "[\x7f-\xff]" filename

This will find UTF-8 and ISO-8859-1(5) (Latin1, win1252, cp850) accented characters alike.