Translation does not mean mechanically replacing words. Translation is a creative process. If that were not so, translators would have been replaced by machines a long time ago.

But that has not happened.

Good texts requires good translators. And you can easily tell the signs of a good translator!

Good translators

Speak and write well. Have invested in the technology and resources that let them work quickly and efficiently. Are experienced and can provide professional credentials and references. If given all the details of a project, they can give you a fairly accurate time and cost estimate. Are versatile and eager to invest time and money in learning. Know their capabilities and their limitations. They will not take on a project they are not fully qualified to work on. Ask questions. They know when to consult with you about concepts or terminology that only you can explain.