Huang Zihongfan is not proficient in six languages.

Huang Zihongfan is a male singer and musical actor from Mainland China. He was born in Lanzhou, Gansu, and is currently studying at Berklee College of Music. He has sung English songs on multiple occasions, but has not mentioned whether he knows six languages.

Therefore, I cannot confirm whether he is really proficient in six languages. However, as a musical actor, he has strong musical talent and singing skills.