It's quite possible that your game is corrupted then.
As per knowledge now, if you had started the game with the settings on Netherlands, it should be continental and not meadow.
Something like this is continental pattern :
And this is medaow pattern:
However, if the Vivillon in discussion here is the Gym leader Viola's Pokemon, then you don't need to worry, her Vivillon will always be Meadow pattern, regardless of region.
Hope I helped!