Grammar (ii)

I asked the question in the last post about how you could teach a language without the grammatical super-structure. The answer of course is ... the same way we teach swimming.... by immersion.
There are plenty of humble folk who have little or no education whose livelihoods depend on speaking a language other than their native tongue. The modestly educated street merchants of an island such as our near neighbour (no, not Tasmania) Bali seem to do quite well. Most ordinary folk in that place have limited education, and many have good command of not just English but also Bahasa Malaysia, and even Japanese.
Not all,but many.
Occupying soldiers pick up working language, though often with awful mispronunciations like danke schön...we have Elvis to thank for Danke Shane! I suspect... which makes every person who has ever learned German shudder (see here) but by and large they don't read novels or poetry!
What you are doomed to experience if your knowledge of grammar is non-existent is the continuing risk of being misunderstood, and the likelihood that you will get stuck at a very elementary level.