'Sabe' can be a Japanese name. Whether a name can have a meaning or not depends on how it is written.
sabe means to know, el sabe is he knows, this may be spanglish as in ; I told him so sabe.
você sabe falar português = you know how to speak Portuguese. você sabe falar português? = Do you know how to speak Portuguese?
Do you know who I am?
Mama Knows
It's a "refran," an old saying. "He who knows [how] to work knows [how] to rest."
It means Who knows
you already know
"Sabe" is the third person singular form of "saber". It means "he knows". There is no Spanish word for "kemo", but a close word would be quién. "Quién sabe" would be "who knows". See attached link for speculation as to what "kemo sabe" means.
"Sabe falar português" in Brazil means "Can you speak Portuguese?" It is a way to inquire if someone is able to communicate in the Portuguese language.
Why doesn't mummy know
It means: "You know what I mean."
"Yo sabe todo" is grammatically incorrect in Spanish. The correct phrasing would be "Yo sé todo," which translates to "I know everything."