No, it's not a translation error; the director needs to own that number of shares.
No, other players cannot prevent the company from floating, because the rules go on to say:
If at the end of a Share Round there are no shares available in a company, it opens, irrespective of whether the Director owns the qualifying number of shares.
This means that if the other players buy all the remaining shares in order to prevent the director owning the requisite number needed to start the company, the company will start anyway.
new i was missing something.