> For thousands of years, in some written languages, there was no space between words. People were expected figure out sentences and clauses while reading aloud. Really?! Addingspacesbetweenwordsseemslikeanobviousthingtodo. According to Wikipedia, spaces weren't added because: (1) Free form of speech is so continuous, adding inaudible spaces to manuscripts would have been considered illogical. (2) At a time when ink…
Segmenting words is actually a quite complex cognitive task that takes a while to acquire, usually considered in the framework of statistical learning[0].
Another aspect here is that the concept of a word is somewhat fuzzy, with compound words[1] emerging quite naturally, particularly in some languages. For relatively recent examples of compounds in English, consider "website" and "cellphone" (both of which are now, as a separate step, gradually becoming the default meanings of "site" and "phone").
So I don't find it too surprising that once upon a time word segmentation was even more flexible.
[0] https://en.wikipedia.org/wiki/Statistical_learning_in_langua...