WARNING! Spoilers ahead, read the following information, at your own risk.
There are several spells used by witches (and ogres,) in the Human World. In magical world, it is not a requirement to say the name of a spell aloud; however, it is vital to do so in the Human World - because they won't be able to use magic, otherwise.
Agrandissement: This can be translated as 'aggrandising' or 'expansion' in English and Chocolat uses this, especially in the earlier chapters in the manga, to make things larger.
Attraper: In English, it can be called 'catcher' or 'trapper'. It is only use once, when Chocolat transforms the heart-shaped hairpin - into a key, to open her mother's diary.
Le Cercle du Cœur: In English, it can be translated as 'The circle of the heart'.
Choco Rune : It is said after 'sugar sugar rune', by Chocolat, whenever she is about to cast a spell or put on her witch outfit (anime only.) Whenever this occurs, time ceases.
Spirale de fleurs : This spell used by Chocolate, several times. 'The spiral of flowers' is a rough English translation for this term.
Galaxie Ambre: The English translation for this spell is 'amber galaxy.' Amber uses this spell in the very last chapter of the manga (Chapter 43.)
Sanction : This is a spell that Pierre uses - when he directly attacks Chocolat for the first time, on their date at aquarium (episode 28.) A rough English definition for this term is 'penance'.
Sugar Sugar Rune: The preceding incantation said aloud, before either Chocolat or Vanilla casts a spell, mostly in the Human World.
Vani(lla) Rune : It is said after 'sugar sugar rune', by Vanilla, whenever she is about to cast a spell or put on her witch outfit (anime only.) Whenever this occurs, time ceases.