batch in bash to replace accents in filenames

slugify.sh

#! /bin/bash
#
# slugify.sh by Ronan
#
# Distributed under terms of the MIT license.
#

cd photos
for file in *.png; do
    filename=${file%.*}
    
    #file_clean=`echo $filename | tr -cs "[:alnum:]_" _ `
    #file_clean=`echo $filename | iconv -c -f utf8 -t ascii`
    #file_clean=`echo $filename | iconv -f utf8 -t ascii//TRANSLIT | iconv -c -f utf8 -t ascii`
    
    file_clean=`echo $filename | iconv -f utf8 -t ascii//TRANSLIT`
    final="$file_clean.png"
    echo "mv \"$file\" \"$final\" "
done
cd ..

I generalized your script as follows:

echo $1
find $1 -regextype posix-egrep -regex '.[{ÁÉÍÓÚÀÈÌÒÙÄËÏÖÜ].' | while read filename; do
file_clean=echo $filename | iconv -f utf8 -t ascii//TRANSLIT
mv -n "$filename" "$file_clean"
echo "$file_clean"
done

Hope this helps someone.