译成 To translate from... into 大家好，

我想知道怎么说
I translate from English into Chinese.
I interpret from English into Chinese.

My attempts：
我从英文笔译成汉语。
我从英文口译成汉语。

However, I'm unaware of whether it is better to use cong...dao...从。。。到
I saw the use of 成 （and 译成） many times （but not 笔译成）so I think it must be in use. A confirmation would be welcome though.
So should I add 笔译成 biyi, or 口译成 kouyi ? In english it's very important to specify that I don't 翻译 only because it's too vague. Translations are always written and interpretations always oral. Please keep that in mind when giving me your answers.
you should use a dispositive marker like 将

我将英文译成中文。 我将英文译成中文
汉语 refers to spoken Chinese; for written Chinese, use 中文

you can use preposition [由 ~ 成] or [从 ~ 成] (they both mean &quot;from ~ to&quot;)

我将哈利波特由英文译成中文 or simply &quot;我將哈利波特译成中文&quot;
you can omit '由英文' because we all know Harry Potter is originally an English novel

翻译 is the standard term for both written translation(笔译) and spoken translation (口译) -- the terms you cited. In practice, no Chinese would use those terms.
Native Chinese would not replace 翻译/译 with either 笔译 or 口译 . We can tell it is a written translation or spoken one by looking into the context. If you say a book is translated into Chinese, you don't need to say it is written; When you say the translators in a meeting translate for the heads of state, we know they are translating orally.
Interpreter is called 传译員; to interpret someone's speech in real time is called 传译 or 即时传译