Ja! Ha! Ha!
He sido tan "banned" hoy...
I´ve been banned, so badly, that my butts hurt.
Your "prohibition" sounds better in English. In Spanish it sounded rude. Ha! Ha!
You have said, grammatically: "SH, te prohibo escribir en español." The rest of the sentence is correct, with this exception: "y poquísimo Portugués" (without "un")
Congrats! You punctuated very well. (poquísimo, portugués, francés, día and sólo)
Your friend (amig@) is a good teacher.
I hate you (with love) for this banning.
Have nice dreams! I´m feeling sleepy.