"War is God's way of teaching Americans geography." This quote has been attributed both to Mark Twain and Ambrose Bierce, and it may not have been uttered or written by either. Still, it accurately reflects that many of us are not internationally savvy.

It's also true that many of us investors often fail to look abroad for promising investments. That's a shame because there are roughly 8 billion people on Earth, and only about 334 million of them -- just 4%! -- live in the U.S. All those other folks live where people are building businesses and buying products. Here are three foreign companies to consider for your portfolio.

If you're familiar with and hopeful about fintech companies, such as PayPal, get to know Adyen (OTC: ADYE.Y) (OTC: ADYY.F). Based in the Netherlands, and with a recent market value north of $35 billion, its shares were recently down about 40% from their 52-week high, presenting a compelling investing opportunity.

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Source Fool.com