(Yo) sé lo que estas diciendo
entiendo lo que dices
Don't worry I'm a fluent Spanish speaker, I know what I'm saying.
No creo que entiendo lo que Ud. quiere decir.
The Spanish translation for the word "minimed" is "dublebas." Here it is used in a sentence: "I need one of those there dublebas, do you know what I am saying?"
It means the person saying this doesn't know Spanish
Assuming you are saying this to someone you know well, it would be "te extraño".
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.
a spanish saying
To answer this, You have to know the full context of what you are saying in English. Usually this means "But I will do it." With this in mind, the interpretation is "Pero lo haré".
U can hear them talk to you
You could say "Lo siento, pero no sé lo que dice en español". This literally means "I feel it, but I do not know that which you say in Spanish".
You say "Hola" (o-la)