Here's why:
* "Kitty" is a pet name for a cat in English. Japanese doesn't typically use pet names like this for animals.
* The Japanese word for "cat" is 猫 (neko). This is the word you would use regardless of whether you're talking about a pet cat or a wild cat.
So, to translate "kitty" to Japanese, you would use 猫 (neko) with the appropriate context.
For example:
* "My kitty is cute" would be translated as 「私の猫は可愛い」 (Watashi no neko wa kawaii).
* "The kitty is playing with a string" would be translated as 「猫は糸で遊んでいる」 (Neko wa ito de asonde iru).
Similarly, in Spanish, the word for "cat" is "gato" (male) or "gata" (female). You would use these words to translate "kitty" in Spanish.