This kind of relaxed word order is also typical for modern Baltic and Slavic languages. Words themselves have enough information encoded in word prefixes/suffixes/endings so that it's possible to decode even a randomly mixed up sentence. It will feel awkward, or stylistically wrong, but nevertheless understandable.

This might help with poetry but comes at a price: it is superhard to internalise all the numerous word forms. I can't image learning Polish, Lithuanian or Russian being only exposed to English previously!