dubdobdee | wiki-illiam #104: q7

Q7:
i: Which language was developed by a Polish ophthalmologist?
ii: Which language of the Romance group has a definite article suffix?
iii: Of which European language is the origin unknown, even to the experts?
iv: Which geographically Scandinavian language is not linguistically Scandinavian?
v: Which European language is the only survivor of its branch of the Indo-European group?
vi: Which Slavonic language is spoken in a country whose national language is not Slavonic?
vii: Which European language is spoken by about 1% of the population of Switzerland?
viii: Which European language has a past tense form which looks like a future?
xi: Which Slavonic language has done away with the case forms of nouns?
x: Which European national language still retains the dual number?

the rules as they have evolved:
a: nice full answers and anecdotes if poss
b: say if googled or no; leave time for non-googlers to play
c: obviously look ahead at future questions if you want
d: don't bring in confirming or dissenting answers from other fora until next set is up and running

spoilers: language-related obviously -- is i esperanto (but there are other invented languages); iii may be basque?; iv i assume is finnish...