| Letter | Vowels | Country | % Correct |
|---|---|---|---|
| O | 2 | Oman | 97%
|
| Q | 2 | Qatar | 97%
|
| Z | 3 | Zambia/Zimbabwe | 97%
|
| Y | 2 | Yemen | 94%
|
| D | 11 | Democratic Republic of the Congo | 88%
|
| H | 3 | Haiti/Honduras | 84%
|
| V | 5 | Venezuela | 84%
|
| F | 12 | Federated States of Micronesia | 81%
|
| I | 5 | Indonesia | 75%
|
| J | 4 | Jamaica | 75%
|
| A | 8 | Antigua and Barbuda | 69%
|
| U | 9 | United Arab Emirates | 69%
|
| L | 5 | Liechtenstein/Lithuania | 66%
|
| R | 7 | Republic of the Congo | 66%
|
| K | 4 | Kiribati | 63%
|
| S | 10 | Saint Vincent and the Grenadines | 63%
|
| B | 9 | Bosnia and Herzegovina | 59%
|
| N | 5 | Nicaragua/North Macedonia | 59%
|
| P | 8 | Papua New Guinea | 59%
|
| T | 7 | Trinidad and Tobago | 59%
|
| E | 10 | Equatorial Guinea | 56%
|
| G | 7 | Guinea-Bissau | 50%
|
| C | 8 | Central African Republic | 47%
|
| M | 6 | Mauritania | 47%
|