Look at the following words:
Most of us don't know what any of this means, but we could tell what language it is. These language evolved over time and have developed there own sounds (though you could easily make a natural-like language). Autlang is just a collection of three letter words. The word for input is "das"; the word for in is "pin" for example.
Though we don't have the means to see whether LFAs learn Autlang faster, I'm skeptical. If using Autlang you have to memorize hundreds of unrelated 2-4 letter long words, as opposed to larger words that can (not for one word of course) be broken down into a few dozen words with maybe 10-15 used quite often.