I recently had to find a particular word in a bunch of files, and instead of manually going into each one to find it, I found a simple way!
Let's say I want to find the word "Proudly" (case sensitive) I would type this:
grep -r 'Proudly'
This will search all files in the current directory, plus all subdirectories and will output the location of the files.
Then, I will open the file in nano and Control - W to search for the word.
I hope that helps someone!