In Latin, word order is mostly free. This is used intensively by poets and other authors to achieve a desired rhythm or rhetoric figures like chiasms. However, this does not apply to regular, spoken language and also to writings without any stylistic aspirations.
My (limited) linguistic experience tells me that languages tend to use such a freedom to encode some information. For example, in the German language, word order is used to encode emphasis when it is free.
Do we know anything similar about a function of word order in colloquial Latin? Note that this is not about aspects of the word order that are fixed by the grammar, such as prepositions coming before the word they refer to.