Yes and No.
Yes - later. There is no time table as of yet as to when it will be available for the I & F. Right now it's only South Korea and US for specific banks and cards. Then they will expand bank and card availability. So, definitely I & F will eventually get it, not sure when though.
No - Currently, S-Pay will not work on the I & F versions here in the US. S-Pay isn't even installed on those versions. In addition, S-pay is only pre-installed on the US versions and S. Korea version only.
AS a result, maybe down the road I & F might work in the US. But IMO, I'd have to say, it's highly unlikely that S-Pay will work on I & F in the US.