Is Arabic the hardest language to learn?

Related questions

1. What country speaks Persian?
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3. Which is the largest peninsula in Europe?
4. Is Dubai the richest city in the world?
5. How rich is the Qatari royal family?
6. Is Dubai the richest country in the world?
7. Which countries are peninsulas?
8. Is India a peninsula or a subcontinent?
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10. What is Qureshi caste?

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18. #italian
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21. #danish
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23. #english
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25. #swedish