Serval has lost the ability to speak. According to Black Rhino and White Rhino, it happened due to an illness that's been going around in the Waterfront Area...
The main difference between 
these two lies in their mouths.
الفرق الرئيسي بينهما يكمن في فمهما
Die beiden unterscheiden sich
in der Schnauze.
La mayor diferencia entre ambos
está en sus hocicos.
Ces deux espèces se différencient
par leur bouche.
La grande differenza tra i due sta nella bocca.
A diferença principal
entre os dois é a boca.
Рот — главное различие
между этими видами.