Rename Text in a Text File

Is it possible for Hazel to look into a plain text file, find a word, rename it (or delete it), and save the file?

I want to write words in my file and depending on what I write, it will execute Hazel actions looking for those contents. After I write the word and Hazel does it magic, I need the word to be renamed or deleted, so it doesn’t execute again.

Hazel does not have any built-in actions to modify the contents of a file. You'll need to look into a script to do that part.

It's good to know it's still possible! I'll research how to do this. Do you recommend a certain language to accomplish this?

Might be doable with a regular shell script using 'sed'. You'd have to google around for examples.