Do you not think there might be a market for software for analyzing text in Farsi perhaps -outside- the region where it's actually spoken?
(disclaimer - work for IBM, but not on Watson, or anything related to intelligence analytics)
Polish as a language is more similar to other languages than Finnish or Farsi. Basically, it's easier to detect Farsi and Finnish because they're more distinct and in smaller language families than Polish, which is similar to many slavic languages.
Incidentally, Poland's GDP is several times that of Finland…