Country Borders by Change of Official Language

When is that, for example, as you cross a country border you change from having English as one of the official languages to having Spanish as one of the official languages? Given two languages, list all such combinations.
Note that some countries don't have an official language and that overseas borders are considered
Based on Official Languages of the World quiz (note that some countries have no official language!)
In each group, answers are sorted alphabetically by the country on the left and then the country on the right
Quiz by scambigol
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Last updated: March 7, 2016
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First submittedMarch 7, 2016
Times taken225
Average score87.5%
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English
Spanish
 
Portuguese
Spanish
Belize
Guatemala
 
Brazil
Argentina
Cameroon
Equatorial Guinea
 
Brazil
Bolivia
Guyana
Venezuela
 
Brazil
Colombia
United Kingdom
Spain
 
Brazil
Paraguay
 
 
 
Brazil
Peru
French
Spanish
 
Brazil
Uruguay
Cameroon
Equatorial Guinea
 
Brazil
Venezuela
France
Spain
 
Portugal
Spain
Gabon
Equatorial Guinea
 
 
 
Haiti
Dominican Republic
 
Persian (Tajik)
Russian
 
 
 
Tajikistan
Kyrgyzstan
Chinese
Dzongkha
 
 
 
China
Bhutan
 
Afrikaans
Tswana
 
 
 
South Africa
Botswana
Arabic
Swahili
 
 
 
Somalia
Kenya
 
 
 
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