Mnemonic memory training is a memory system that allows you to store information in and recall it from your long-term memory, and, in the case of learning a new language, your speech center. Mnemonics gives you a way to organize information, store it, and recall it. The better information is organized and stored, the easier you will be able to recall it when it is needed and the longer it will stay in your head. If you do mnemonics correctly, you concentrate and focus on information you want to remember in a way that will almost guarantee you will never forget it.
Some twenty-five years after going through my first mnemonic memory course, I still recall vocabulary words in French and I do not speak French at all. In the course, as an exercise, we learned some French words using the Substitute Word System