A small program for working a good amount of tasteless dirty language into a text.

dirtywords.py

import random as r


dirty_words = []
with open('dirtywords.txt', encoding='utf-8') as dw:
    for phrase in dw:
        dirty_words.append(phrase.strip())

output = open('output.txt', 'w')

with open('source.txt', 'r', encoding='utf-8') as f:
    for line in f:
        for word in line.split():
            if line.index(word) % r.randint(1, 5) == 0:
                line = line.replace(word, r.choice(dirty_words))
        output.write(line)

output.close()