Why is English considered the hardest language to learn?

Related questions

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4. How do I change the language on Adobe Reader?
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10. What language is similar to Czech?

Tags

1. #spoken
2. #difficult
3. #languages
4. #makes
5. #characters
6. #english
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15. #written
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18. #master
19. #versions
20. #finnish
21. #takes
22. #chinese
23. #learn
24. #learning
25. #several