How do you approach multicultural marketing to reach diverse audiences?

It surprises me that the most voted answer is already a solution rather than a strategy. Collaborating with multicultural influencers is an action that should be considered only once you know if there are cultural differences for your target audiences and customers that you need to address, and only then you will be able to start thinking about the way how to do it. 

If there is a real need to reach diverse audiences from diverse cultural backgrounds, you'd need to work on specific messaging and campaigns, and moreover, even consider that the targets will need to be different for each different target audience, as a Japanese potential customer doesn't behave as a Northamerican one, neither converts in the same way.