Learn Farsi: این کنترل آسان نیست.

Yes! Farsi has adopted many loanwords from French and English. Kontrol means control and can be used as a noun, like in this sentence, or combined with kardan to form the verb kontrol kardan (to control).

Why isn't there an Ezafe connecting in and kontrol?

Demonstrative adjectives like in (this) and ân (that) do not use the Ezafe (the hidden e or ye sound) to connect to their noun. They sit directly next to it. That is why it is just in kontrol and never in-e kontrol.

Could I use râhat instead of âsân in this sentence?

Yes, in everyday conversation Farsi speakers often use râhat to mean easy. However, âsân specifically means easy (the opposite of difficult), while râhat literally means comfortable. For an abstract concept like control, âsân is slightly more precise.