High Quality
It is a common misonception that anyone who is bilingual or even anyone with a foreign language degree can translate. That is simply not the case - a good translation requires years of training and specialization. Translating means that you have a very good understanding of what you are translating, that you have the necessary skillset and methodology to carry out a preliminary reseach, find parallel texts etc. So if your translated text is going to appear, for example, on a leaflet, you might want to make sure it does not end up on a "funny mistranslations" joke site!