Limiting the poll to 200 books (if I'm understanding it right... the cited le monde page is paywalled), selected by the elite French-literati, who then polled sub-elite French-literati, is a questionable basis for a list of "books of the century", even in France. Numbers of votes for each book would've been nice, to see how unanimous the top selections were.
8/100, in any language, are from the last third of the century (after 1967). Of those, 4 are well-known in North America (Styron, Eco, Rushdie, Solzhenitsyn). Of those, only two, Styron and Rushdie, are originally in English.
The most recent -en- works prior to those two were Kerouac in 1957 and then Nabokov and Tolkien in 1955.
year: number (fr/en/other)
1900s: 7 ( 1 / 4 / 2)
1910s: 4 ( 3 / 0 / 1)
1920s: 20 ( 8 / 7 / 5)
1930s: 12 ( 6 / 5 / 1)
1940s: 19 (10 / 4 / 5)
1950s: 20 (13 / 6 / 1)
1960s: 12 ( 7 / 0 / 5)
1970s: 4 ( 1 / 1 / 2)
1980s: 2 ( 0 / 1 / 1)
totals: 49 / 28 / 23
Given the chronological bias, and few postwar -en- works probably due to distribution and translation challenges, it's pointless to mention all of the American and even British classics they left out from later in the 20th century. English-language books from the 80s and 90s, particularly science fiction, might have barely reached mainstream French consciousness in 1999.