spelling audits

1-Introduction/1-intro-to-ML/README.md

1-Introduction/2-history-of-ML/README.md

6-NLP/1-Introduction-to-NLP/README.md

6-NLP/2-Tasks/README.md

6-NLP/README.md

9-Real-World/1-Applications/README.md

README.md

quiz-app/src/assets/translations/en.json