Cybertronian languages

It should be little surprise, given a moment's thought, that distinct Cybertronian languages exist. The Transformers did not go about speaking English or any other known Earth language long ages ago on their distant metal world. Though the records of such conversations are frequently translated for us, we should not forget that these conversations originally flowed in odd electronic syllables past strange metallic lips, or were etched by alien hands long eons before the first humans painted muddy shapes upon dark cave stone.

Madman's Paradise
The first language used by the Transformers was likely the Quintesson language inherited from their former masters. It can be seen upon the walls of the Quintesson dimensional transporter room. It rather resembles Egyptian hieroglyphs.

More than Meets the Eye
The language used by the Autobots when they first awoke in 1984 was easily learned. Spike Witwicky learned to read Modern Autobot after only knowing the Transformers for a single day. (Autobots and humans could also converse freely on their first encounter, though the hows and whys aren't addressed onscreen. On the MUX the Autobots were programmed by the Ark with human languages collected by the Sky Spy probe.)

Cosmic Rust
Ancient Autobot was the language used by the ancient Autobot colonists that fled Cybertron in the distant past. Most modern Transformers (or at least the Decepticons) could not read it.

The Golden Lagoon
In the episode "The Golden Lagoon", Beachcomber uses a built-in translation program in an attempt to translate bird song, without much success. Presumably, all Transformers possess this translation program and not just Beachcomber. On the MUX, when Teletraan I was first reactivated and went about scanning earth "life forms" that it also scanned and translated earth languages. It could have also downloaded it into each Transformer as it repaired them, explaining why both the Autobots and Decepticons could speak English right off the bat.

Shattered Glass
The Around Cybertron news program features both advertisements and a news scroll at the bottom of the screen written in Autobot text.