Polonia /
Poland and France cultures are similar [112]
the soul of the Polish nation - l'ane de la nation polonaise
I suppose you mean
l'âme de la nation polonaise rather than
l'ane (the donkey) de la nation polonaise??
If not for the Romans today`s French would speak in some Polish dialect.
Nope. Remember that the vikings navigated the Seine from there raided France several times from the IXth century until they decided to settle around the river, hence the name Normandie (land of the men from the North). Then a century later after having settled and become de facto French (France has
jus soli and not
jus sanguinis), they raided England thanks to William the Conqueror. What can we infer from this:
1) Britain is in fact a French colony which turned sour :)
2) if not French, the French would be speaking a Danish or Swedish dialect. Proximity between Scandinavia and France is further confirmed by the fact that the current Royal family of Sweden is of French origin, the first of the dynasty having been Jean Baptiste Bernadotte, one of Napoleon's marshalls, who became King of Sweden in 1818.