So, taking into account the fact that America only has about 1.6million French speakers, and isn’t strictly speaking a Francophone nation, and the fact that Pennsylvania had no historical French settlement it would presumably have been more difficult for Phil to learn the language than it would somewhere with a large French speaking community. With that in mind and also the fact that Phil is an adult learner, and thus less susceptible to learning a second language quickly, a conservative estimate, based on the idea of him taking lessons everyday (he clearly really wants to impress Rita), it would have taken somewhere around 12 years to become completely fluent (though ex-pats living in Francophone countries sometimes state it takes longer even than that).
It’s a very thorough analysis. Also? Who cares if the actual groundhog did or didn’t see his shadow today. Still looking at six more weeks on winter.