Er, I don't think that's it. French is pretty far from being polysynthetic and is usually classified as analytic. Why do you say it's polysynthetic? Because of

Er, I don't think that's it. French is pretty far from being polysynthetic and is usually classified as analytic. Why do you say it's polysynthetic? Because of the few personal pronoun clitics it has? I'd imagine the 14 grammatical cases of Estonian would be harder to handle than French grammar, and yet they have Estonian.