"Ro" is a Robloxian English prefix descending from Eurobloxian colonizers in Bloxveld who wished to differentiate from their inventions and descent from the "Less Superior" Bloxveldian creations.
The prefix means to be of descent or creation of a "Western Civilization" while the object simultaneously exists in some capacity in another language or culture. Usually, it is used to describe something that was originally made.
A large example of this prefix being used is in the nation of Ro-Kasom. When the first Bloxian settlers arrived on the island from western South Bloxmerica, the word "Kasom," meaning in native languages "Homeland," was used to describe the island. However, settlers interpreted it as the English name for the island. Thus, it was seen fit to add the prefix "Ro" as the nation existed simultaneously in Kasomiam and English but was settled by the Bloxians, which were seen are a better people.