Love it or hate it, bash does not care.
Look for all files with a specific text and replace it. Using arrays, for loops, & grep.
grep -rnw './' -e 'Lorum ipsum'
FILES=('./latin/speeches.txt' './usa/preamble.txt')
for i in ${FILES[@]}; do
echo $i
sed -i 's/Lorum ipsum/We the people/g' $i
done