Assalamo alikom wa rahmato Allahi wabarakato
I think it's all relative. I'm married to a moroccan and most(not all) of his friends have had bad experiences with their non-north african wives(or ex- wives I should say!). It's not an easy thing indeed, I must say;and they keep saying to my husband how 'wrong' this relationships are, but I have commited myself to prove them wrong.
Mainly , the problems I have had with my husband are not because we are from different cultures but because we both have very different temperaments and religious practicing levels(yes, yes, we're both muslims) . I also know other very happy mixed marriages, by the way. So it's both difficult and wrong to generalize.
I think it all depends on how each of the spouses is
commited to Allah and to understand, accept, respect and harmonise :shake:the differences in backrounds.
Having a different 'culture'
it is not a synonym of having problems of communication. Remember that people from the same country, city, culture are getting divorce every day too.
I also would like to add that it's important to talk very clearly

about these things and the expectations you both have, prior to marriage.
When there are cultural differences, it is essential to talk about them and make sure there are not dubious or mixed feelings. For example : I have always found very rude when my husband raises his voice even when talking about the weather! So, I didn't know at the beginning that in North Africa they basically don't talk...they shout!!

I just wished he had explained that to me before!:angryred: That doesn't mean that I have finally accepted the shouting though, but at least he knows I hate it, and he tries to talk in a more gentle way(sometimes).
Well, If you do a very strong istikhara, will also help heaps.
May Allah guide us all.
Assalamo alikom wa rahmato Allah wa barakato