How good is English to reach the level of translation?

As a translator, it is best to get a national translation certificate. This is very authoritative. This certificate is necessary if you want to be an excellent translator. Generally speaking, if you are just an ordinary translator, CET-4 is enough, and there are only about 8,000 common English words. There are nearly 4500-6000 in CET-4, which is enough for general translation. The most important thing is to practice often, otherwise the translation skills can't be mastered.