Correction: It is unacceptable and unforgivable to make mistakes in English ! We should never make any mistakes ! Lol, everyone makes mistakes learning a language.

Charlotte, It is unacceptable, unforgivable, choking, to be afraid to make mistakes in English! We should never be afraid to make mistakes. You learn by making mistakes. The human brain is a self-correcting computer. The more you use English, the more mistakes you will make...and you can learn from every single one of them! So keep studying and making mistakes. Never stop trying!

It is unacceptable and unforgivable to make mistake in English. We should never make them. You must use "them", otherwise the sentences hang in the air without any connection.

It is unacceptable, unforgivable and choking to make mistakes in English! We should never make any! One comment - "choking" here is a little out of place.