"Comment vas tu?" means how are you?, using the familiar form in French.
"familiar with" in French is translated as "familier avec".
a guy is 'un gars' (familiar) or 'un mec' (more slangish) in French.
prenons une cuite (slangish / familiar) Viens, on se bourre la gueule (very familiar)
You are lying is "tu mens" (singular and familiar) or "vous mentez (plural OR formal) in French.
Je veut avoir (I want to have) Je voudrais avoir (I would like to have)
"familiar with" in French is translated as "familier avec".
(familiar) "Your birthday" in french. If it is not familiar, it becomes "Votre Anniversaire".
If you are familiar with the person it is : Ou est-tu? If you are not familiar (formal) Ou-etes vous?
Big breasts are 'des gros seins' (familiar/slangish) in French.
'ça te va?' is a familiar expression for 'does that fit you / do you agree?' in French.
Votre beauté (formal) Ta beauté (familiar)
les enfants, les gosses (familiar)
a guy is 'un gars' (familiar) or 'un mec' (more slangish) in French.
Butt is called 'le derrière' in French, or 'le cul' (familiar / slangish)
- "nie znam tego" is not French, it is Polish for: "I don't know this/that." or "I am not familiar with this/that."
prenons une cuite (slangish / familiar) Viens, on se bourre la gueule (very familiar)
Grand-mere is French for grandmother. Mamie is a familiar name, the equivalent of Granny or Nana.