In English and most other languages, positively including Spanish, the year that elapses between the birth and the first birthday of a person, say Noah, during which he is [0 years and] n months old, with n < 12, is called the first year of his life, not the "zeroth" year (or, if using cardinals instead of ordinals, year 1, not year 0).
So, the year during which Noah is 1 year old is the second year (or year 2) of his life, and the year during which Noah is n years old is the (n+1)th year (or year n+1) of his life.
Does the above rule hold in the biblical Hebrew used by the Priestly school in Gen 7:11? Specifically, does Gen 7:11, which I will quote from the NASB...
"In the six hundredth year of Noah’s life, in the second month, on the seventeenth day of the month, on that day all the fountains of the great deep burst open, and the floodgates of the sky were opened." (Gen 7:11)
... mean that the Flood started when Noah was 599 years old?
Note: my question is strictly at the linguistic level about the plain meaning of the Gen 7:11 text in isolation, so please answer it at that level, just ignoring Gen 7:6.