No, this imprint is correct on the Bohème models in question. According to the manufacturer, the overlays of these versions were not made in its own factory but by Cartier in France. Because a significant step in production thus took place outside Germany, the instrument carries a laser engraving with the addition France in place of the usual marking.
Those affected are the Bohème variants with an overlay, so in particular the Platinum Crystal version and, on the evidence available, the models with a silver overlay as well; on the remaining Bohème models in precious resin, by contrast, a France engraving is not to be expected. A check on authenticity should therefore not hang on this engraving but on the nib, the finish of the fittings and the stone setting, and the ident number. Conversely, a seller's note about the France imprint is no reason to hold back from a purchase.