49 years.
the officail language of guinea-bissau are french iam came from guinne.. Wrong!!! It is not french! Portugese is the official language, though the common tongue is Crioulo - a mix of medieval...
It depends mainly on your mode of transport
Guinea-Bissau: ˈɡɪni bɪˈsaʊ República da Guiné-Bissau, International Phonetic Alphabet: [ʁɛˈpublikɐ dɐ giˈnɛ biˈsau])
the offficial language is your face