You know what? Transformers doesn't need to borrow from the lores of other franchises. It has its own lore, and here's a shocking thought, maybe they might actually do something completely different for the movies!
I for one would love to see something new and original in the movies, I detest the idea of Unicron showing up as much as I detest the idea of Megatron being turned into Galvatron (more so given that in recent years they've been separate characters)
I also like the idea of a Cybertronian speaking a language other than English, if they happened to have landed in a non-English speaking part of the world then it's perfectly logical that they would learn the native language. I also think it's a good way to add a bit of character to the bot.
Even though at the end of the day it's just there to market to the Asian audiences. But then again, this is a franchise that started out as a 30 minute toy commercial.