Human language is already very efficient for conveying the ideas we have. Some languages are more efficient at conveying certain concepts, but all are able to handle the 90% case. I'd expect any attempts to build a "technical dialect of English" to go about as well as Esperanto.

We already speak in a "technical dialect of English". All we need is some jargon to talk about technical things. (Lawyers have their own jargon too, also chemists, etc)

Some languages don't have this kind of vocabulary, because there aren't enough speakers that deal with technical things in a given area (and those that do, use another language to communicate)