If you can give time and place then its easier to say if someone can come. You know people have to plan what they do.
And i assume one of you belongs to foreign cristian parish (im not sure how to read this part, ask in church if you didnt already) and you do have "no barrier certificates" what you can get on your embassy i think. I think you checked these but have to make sure. Marriage is legally binding in here so its not "just come and do"

Dont take this an offence, just want to make sure you know.
I would come but i dont speak english and dont have proper clothes (and i dont know yet what i do in january) and would scare priest anyway (i think i look like a lalli, genetic fear)

Even if im atheist i think marriage is beautiful ceremony.
I hope you find people but date and place is needed
And whatever happens Congratulations and may Great Spaghetti Monster be with you (he doesnt have beautiful ceremonies tho

)