No, you cannot do that as just an insurance. You cannot pre-register courses beyond the number of credits required for graduation. You can pre-register for German, French, Chinese and Spanish (intermediate, advanced classes) up to 2 classes in one term within the number of credits needed for graduation. However, if you are in your final year and you can expect to graduate by going beyond the above limitation, you may be able to take those courses. For details, refer to "Handbook of Liberal Arts and Sciences Courses".