| Countries | Language(s) in de facto status | % Correct |
|---|---|---|
| United States | English | 97%
|
| Bosnia and Herzegovina | Bosnian, Croatian and Serbian | 90%
|
| Japan | Japanese | 87%
|
| Mexico | Spanish | 81%
|
| Argentina | Spanish | 77%
|
| United Kingdom | English | 77%
|
| Taiwan | Mandarin Chinese | 74%
|
| Australia | English | 61%
|
| Uruguay | Spanish | 48%
|