“EVERYONE has the intuition that some languages are more difficult than others. For the native English-speaker, professional agencies that teach foreign languages have made it quite clear. America’s state department reckons that Spanish, Swedish or French can be learned in 575-600 class hours (“Category 1”). Russian, Hebrew and Icelandic are more difficult (1100 class hours, “Category 2”). And Arabic, Japanese, Mandarin and a few others are in the hardest group, Category 3, requiring 2200 class hours. But what makes a language difficult?” [The Economist].
The Economist explains:
- What makes a language difficult? (economist.com)