The Gem Language is a language that appears in writing throughout Steven Universe in the background art, and as a minor plot point in "Monster Reunion". It is presumably one of the native languages of the Gem race.
The language is depicted in:
- "Steven the Sword Fighter" (on the columns of Pearl's Arena),
- "Sworn to the Sword", "Steven vs. Amethyst", and "Mindful Education" (on the columns of the Ancient Sky Arena),
- "Monster Reunion" (on papers that Centipeetle writes on),
- "Bismuth" (on one of the weapons in Forge),
- and "Gem Heist" (on the pillars of the Zoo's Containment Area).
An alternate form of the script appears throughout Attack the Light in scenery and in-game dialogue.
The Crewniverse has yet to reveal anything about the language's grammar, orthography, or lexicon in canon, and it has not been heard spoken. It is likely not an alternative script or substitution cipher for English, as it has more than 26 characters. Some of the characters resemble simplified Chinese; among those characters are: 中 (middle), 門 (door), 日 (day), 目 (eye), 几 (amount), 月 (month), 山 (mountain), 开 (open), 王 (king), 田 (field), 丑 (ugly), and 巳 (pat).
In "Monster Reunion", Centipeetle's script writes appears somewhat different to the previous instances of the script. The elements are written similarly to the Arabic script as opposed to the runes seen on the show. Steven mistakes these for meaningless scribbling when he first sees it, but Pearl describes it as "decently legible". It is possible this is a cursive or stylized form of the written language, or a different writing system entirely.
When directly translated from these fonts into readable text, "BLAH FHJOW NVG FKKD HFG" and "OUEIT JJOKLE" hold little to no meaning.