Translating a PDF from English to Spanish can indeed be a challenge. It is very important to choose the right service that can handle such difficulties. I, for example, use Translate.com . They have experts who know all the nuances of PDF translation. They not only translate the terminology correctly, but also preserve the formatting. This is especially useful for documents with technical content or complex vocabulary. Most services do not pay attention to this, and then you have to correct mistakes for a long time.