It means, "...writes and knows Spanish..."
It could also mean, "...[you] know and write Spanish."
Hay alguien que sabe que dice esto - es espanol.
Quien Sabe means "Who knows?"
"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.
Why doesn't mummy know
It means "You know Spanish, sister."
It is to understand (someone or something). (Adapted from Spanish sabe, he knows.)
This sentence is a mix of Spanish and appears to be somewhat unclear. It seems to convey feelings of adoration towards someone who knows Spanish but might still be learning.
¿Sabe (ella)?
Sabe usted.....
sabe means to know, el sabe is he knows, this may be spanglish as in ; I told him so sabe.
No. 'You know' is "usted sabe." If you said, "Ella me sabe," you would be saying, "She knows me." But the kind of 'know' this is is the academic kind, not the empirical, experiential kind.
Ella sabe leer.