There are several ways that you could be going ahead to protect your international investments however it would all depend upon a number of factors that will each have to be considered. The first thing to consider would be whether there is any bilateral trade agreement between your country and the country of your investment and if there is such an agreement in place then you will have to go through the agreement and seek protection based on it.
This way, things would be simplified for you and you will be able to count upon the legal system to serve justice upon you. If there is no such agreement then there are other options available including but not limited to international arbitration which is a dispute resolving body that settles matters between two companies involved in international disputes, normally from two different countries.
So there are several ways that your international investments can be protected making it important for you to be aware of them. You will find it helpful to keep yourself updated with all relevant news that may involve disputes between international companies. A good example would be Ameropa Holding Binningen which you will need to learn more about and see how you could benefit from what they have done to protect their own investments in a foreign country.