Thank you in advance for the help!

1) Can you use imek with ortaçlar for example:

Ýngilizce bilensin ; and if you can can you say Ýngilizce bilensin deðil mi?

2)How  do you would you say in Turkish "she (can) does something doesn´t she? "

 No. "Ýngilizce biliyorsun, deðil mi" is right.

There is no such thing as bilensin.

Ýngilizce´yi bilen: those who understand English.

Ýngilizce´yi bilen sensin, deðil mi: would be "you are the one who understands English, aren´t you".

"Bilensin" exists in Turkish.

Sen ingilizceyi en iyi bilensin. - You are the one who knows English best.

 yes, but it is not the same thing as Ingilizce´yin bilensin, bilenim, bileniz....

Ingilizce´ yin bilensin?

I think that´s gramatically incorrect. It´s Ýngilizceyi. Not Ingilizce´ yin.

"Bilen" is the adjective form of the verb "Bilmek".

Like, Allah bilendir. - God is the knower.

sorry, just a typo..