Marking the passing of French culture?
The film seems a celebration of Frenchness; the art, the culture, the countryside. But the plot; emigration to America and China, kids taught in English, the younger generation talking about what is actually just French as been "another era", even the grand-daughter at the end sadly realising that the France she knew as a child has been sold off and taken from her future children. The film seems deliberately analogous to the wider loss of France to American cultural individualism and cheap consumerism. It's the same loss suffered here in the UK though we succumbed sooner and didn't realise it, perhaps because of the shared language the American culture overwhelmed us more subtly.
Either way an interesting typically French "Quite film", sort of Posh "mumblecore" with a lovely feel to it.