AFGHANISTAN The official languages are Dari and Pushto. Dari is the Afghan version of Farsi. An Iranian Farsi speaker can communicate easily with an Afghan Dari speaker. However,  Pushto is a completely different language. A Farsi/Dari interpreter will not be able to communicate with a client who speaks Pushto.
ALBANIA The official language is Albanian. As a result of the proximity of the countries, some Albanians may be fluent in Italian.
ALGERIA The official language is Arabic. However, many Algerians will be fluent in French.
ANGOLA The official language is Portuguese. A client from Angola may be more comfortable with the accent and vocabulary of an interpreter from Portugal than from Brazil.
ARGENTINA The official language is Spanish.
AUSTRIA The official language is German.
BANGLADESH The official language is Bengali. However, a large majority of individuals of Bangladeshi origin resident in the U.K. are speakers of the Sylheti dialect from the North Eastern corner of the country. Some Sylhetis may be comfortable conversing in Bengali. You should never use a Bengali interpreter for a client who only speaks Sylheti. Older Bangladeshis who were educated in the days of East Pakistan may also speak Urdu.
BELGIUM The official languages are Dutch, French and German.
BRAZIL The official language is Portuguese. The Portuguese spoken by Brazilians is broadly the same as that spoken in Portugal. However, there may be subtle differences on occasion. If possible, it is ideal to use a Brazilian Portuguese speaker for a Brazilian client.
BULGARIA The official language is Bulgarian.
CAMEROON In common with most African nations, the number of distinct extant languages is immense (ethnographers have identified nearly 300). However, the official languages are English and French. The most commonly spoken non-European languages are Arabic, Bamoun,Ewondo, Fulfulde and Bamil�k�.
CANADA The official languages are English and French.
CAPE VERDE The official language is Portuguese.
CHILE The official language is Spanish.
CHINA The official language is Chinese (Mandarin dialect) . 50 million people in the southern provinces speak the Cantonese dialect as their mother tongue. The dialects are radically different. A Cantonese interpreter from Hong Kong may be suitable for a Cantonese client from the mainland but should never be used for a Mandarin client.
COLOMBIA The official language is Spanish.
CONGO The official language is French. Four other languages have official status: Kinkongo, Lingala, Swahili (Kingwana dialect), and Tshiluba.
CUBA The official language is Spanish.
CYPRUS This partitioned island has two official languages: Greek and Turkish.
CZECH REPUBLIC The official language is Czech. Many Czech speakers may also be fluent in Slovak. Although the two languages are very closely related they are not identical. For this reason, you should always endeavour to use a native Czech speaker for a client of Czech origin.
DENMARK The official language is Danish.
DJIBOUTI The official languages are Arabic and French. A number of individuals from the south of the country speak Somali.