Rassdyt

Correction: How could something as simple as having variations in one's speech be a mistake? Especially considering the plot of the series occurring after the Attack of the Clones, in which Jar Jar surely could have gotten more used to speaking in a more formal manner, being among the senators.

Rassdyt

It's a speech pattern common to all Gungans, not just Jar Jar. Every time any Gungan says the word you, they say yousa, even the leaders, who would speak in a 'more formal manner'.

The difference between Jar Jar and, let's say, Boss Nass, for instance, is that, and I think it is safe to say that, while Boss Nass likely remained active in his original Gungan community, Jar Jar has been active outside that community for many years at this point. So it makes perfect sense for Jar Jar to pick up certain manners of speech from the people he works with and implement them into his own way of speaking.

Rassdyt