This quote praises the expressive and captivating nature of a person's eyes, suggesting that they communicate emotions and thoughts in a unique and enchanting manner.
"Her eyes have their own vocabulary" signifies that the person's eyes are exceptionally expressive, conveying a wide range of emotions and feelings without the need for words. They possess a language of their own, capable of speaking volumes without uttering a single syllable.
"What a beautiful language to learn" celebrates the beauty and allure of this non-verbal form of communication. It suggests that getting to know and understand the emotions conveyed through her eyes is a delightful and enriching experience.