Dear
@Toni,
thank you for using the platform in addressing your sitaution.
As for yozr question, please follow the link to our blog as we have addressed all rhe relevant issues around marriage in Germany or with a German person there:
https://wefugees.wordpress.***/2018/04/20/heiraten-in-deutschland-how-to-marry/
In your particular case it would be best to get married in France already and then apply for family reunification.
I hope we could address your qurstion, if you need further guidance please do not hesitate to reach out to us.
Best regards,
Nilab