Hiring an Interpreter

Check out Interpreters do the talking

Check out Translation Getting_it_right 

These resources will provide you with examples of the different modes of interpreting that interpreters use, the setting in which different modes are considered the most appropriate as well specific things to look for when hiring an interpreter that will ensure you’ve hired a competent interpreter that will perform their job seamlessly.

If what you need is a translation, Translation Getting_it_right  from the American Translators Association, will guide you in considering what factors are important when you are needing a translation.