1669: -o in Australian English Jul 10, 2019
English varieties differ all over the world, within small regions and across oceans. While not a major grammatical change, there are in some ways countless options in Australian English for abbreviating a word and adding -o, such as in 'arvo' for 'afternoon' or 'garbo' for 'garbage collector'. There could theoretically be thousands of these, and while a few have carried over into British English for instance, it is in Australian English in which this feature is so productive.
Check out the new video on grammars here:
https://www.youtube.com/watch?v=g-6K99Jz9hY&t=1s