General Overview
The Maya hieroglypic writing is arguably one of the most visually striking writing systems of the world. It is also very complex, with hundreds of unique signs or glyphs in the form of humans, animals, supernaturals, objects, and abstract designs. These signs are either logograms (to express meaning) or syllabograms (to denote sound values), and are used to write words, phrases, and sentences. In fact, the Maya can write anything that they can say.
While we're on the subject of what the Maya could "say", let's talk about Maya languages. The "Maya" in general were actually not a single people but many nations with different, but related, cultures, religions, and languages. Of the many Maya languages, only two (possibly three) were written down with the hieroglyphic system. It is thought that speakers of the Ch'olan language, and possibly also those of the Tzeltalan language, were the inventors of the Maya writing system. Another group, the speakers of Yucatec, adopted the script to write their own language. However, in some places, both languages were represented on hieroglyphic inscriptions, which not only stumped archaeologists for many years but also offered tantalizing clues into how Maya languages have interacted.