RUI (what an ugly name btw) is a liar.
Ethnologue report for CAPE VERDE:
http://www.ethnologue.com/show_country.asp?name=Cape+Verde+Islands
Languages of Cape Verde Islands
[See also SIL publications on the languages of Cape Verde Islands.]
Republic of Cape Verde. República de Cabo Verde. 415,294. National or official languages: Portuguese, Kabuverdianu. Literacy rate: 37% to 70%. Information mainly from J. Holm 1989; S. and T. Graham 2002. The number of languages listed for Cape Verde Islands is 2. Of those, both are living languages.
Living languages
Kabuverdianu
[kea] 393,943 in Cape Verde Islands (1998 S. Graham). Population includes 255,101 in Sotavento or 65% of the speakers, 138,842 in Barlavento or 35% of the speakers. Population total all countries: 926,078. Sotavento dialect is on Santiago, Maio, Fogo, and Brava islands; Barlavento dialect is on Santo Antão, São Vicente, São Nicolau, Sal, and Boa Vista islands. Also spoken in France, Germany, Italy, Luxembourg, Netherlands, Portugal, Senegal, Spain, USA. Alternate names: Caboverdiano. Dialects: Sotavento, Barlavento. There is a creole continuum and some decreolization. Lexical similarity 59% with the Gulf of Guinea creoles. Classification: Creole, Portuguese based
More information.
Portuguese
[por] 14,817 in Cape Verde Islands (2004). Classification: Indo-European, Italic, Romance, Italo-Western, Western, Gallo-Iberian, Ibero-Romance, West Iberian, Portuguese-Galician
More information.
---
So, Portuguese in Cape Verde is spoken only by a small minority.
Ethnologue report for CAPE VERDE:
http://www.ethnologue.com/show_country.asp?name=Cape+Verde+Islands
Languages of Cape Verde Islands
[See also SIL publications on the languages of Cape Verde Islands.]
Republic of Cape Verde. República de Cabo Verde. 415,294. National or official languages: Portuguese, Kabuverdianu. Literacy rate: 37% to 70%. Information mainly from J. Holm 1989; S. and T. Graham 2002. The number of languages listed for Cape Verde Islands is 2. Of those, both are living languages.
Living languages
Kabuverdianu
[kea] 393,943 in Cape Verde Islands (1998 S. Graham). Population includes 255,101 in Sotavento or 65% of the speakers, 138,842 in Barlavento or 35% of the speakers. Population total all countries: 926,078. Sotavento dialect is on Santiago, Maio, Fogo, and Brava islands; Barlavento dialect is on Santo Antão, São Vicente, São Nicolau, Sal, and Boa Vista islands. Also spoken in France, Germany, Italy, Luxembourg, Netherlands, Portugal, Senegal, Spain, USA. Alternate names: Caboverdiano. Dialects: Sotavento, Barlavento. There is a creole continuum and some decreolization. Lexical similarity 59% with the Gulf of Guinea creoles. Classification: Creole, Portuguese based
More information.
Portuguese
[por] 14,817 in Cape Verde Islands (2004). Classification: Indo-European, Italic, Romance, Italo-Western, Western, Gallo-Iberian, Ibero-Romance, West Iberian, Portuguese-Galician
More information.
---
So, Portuguese in Cape Verde is spoken only by a small minority.