In British English^x, Marriage^x

(Note: I'm a British English speaker, and there may be UK/US usage differences here. There may also be differences in personal preference.) I would generally use "congratulations on". In cases such as "Congratulations on/for your marriage", or "Congratulations on/for...

Can you unpack a bit more the nuance of the colloquial Danish expression? Phrases that spring to mind in English are things like "arranged marriage", which isn't quite right, or "bartered with other plantation owners", which doesn't quite bring across the dehumanising element of treating...

IMO only the present participle really works here - you are describing a continuous, non time-specific activity. I have only ever heard sailed used passively when it is a ship that is sailed. The concept of these people being cargo or chattels would need a word like shipped or transported...

My comments apply to British English only. That would mean that the two families are sharing one house, not lving next door to each other in two separate houses/flats that are adjoining. Perhaps it is the living arrangement itself causing some confusion. It would be unusual to do this in the...

yes your last option would be much better. Or 'my son's marriage broke up'. The 'two family housing' doesn't sound natural to me (and i had to look up duplex) for British English.