Foreign laws should only be a problem if the property is realty (land, houses etc) situate in that foreign country.Under private international law , in the absence of a will made under the laws of that country to direct its disposal, that property passes under the laws of intestacy in that country. Everything else passes in accordance with the will of the testator, under the law of the country to which the will belongs. Thus if a man dies owning a house and a yacht in France,leaving both to a friend, the friend gets the yacht, but not the house, under the man's sole British will ,but the house goes to the man's widow and/or children as provided for by French law on intestacy. The man would have to have made a French will to dispose of the house.
That's worth remembering if you are in the happy position of owning such a property.