10. Switzerland
Switzerland offers a simplified naturalization process to spouses of Swiss nationals. Getting a Swiss citizenship through residence permit is a rather long process. Undergoing naturalization through marriage however takes five years minimum. The conditions are that you have been married to a Swiss national for at least three years at the time of application and that you have lived in Switzerland for a total of five years. There is no language requirement such as those set by some other countries on the list. As SwissInfo notes, to be eligible you have to be “well integrated, law abiding and not endanger Switzerland’s external or internal security.“