@, the article first must be deleted from the old Q-number.

I see some other problems here as well: 

 mnemotechnic d:Q13461032 „learning technique that aids information retention”, „La mnémotechnique est l’ensemble des méthodes permettant de mémoriser par association d’idées, (chacune d’elles étant appelée mnémonique).” 
 mnemonic d:Q191062 „phrase for remembering”, „mnemonic device”, german: „Merkspruch”
 Method of loci d:Q1758418 „a mnemonic device adopted in ancient Roman and Greek rhetorical treatises”, „L'Art de mémoire (Ars memoriae), appelé aussi méthode des loci ou méthode des lieux, est une méthode mnémotechnique pratiquée depuis l'antiquité”, german: „Loci-Methode”
 Art of memory d:Q16243122 „The art of memory (Latin: ars memoriae) is any of a number of a loosely associated mnemonic principles and techniques used to organize memory impressions, improve recall, and assist in the combination and 'invention' of ideas. An alternative and frequently used term is "Ars Memorativa" which is also often translated as "art of memory" although its more literal meaning is "Memorative Art". It is sometimes referred to as „mnemotechnics”.”