Predictability and parseability of the real word-order grammars of 51 languages (red), indicated by International Organization for Standardization codes, compared to baseline word-order grammars (blue distribution). Predictability and parseability scores are -scored within language, to enable comparison across languages. The gray curve indicates the approximate Pareto frontier of computationally optimized grammars, averaged over the 51 languages, with dashed SDs.