Old Sophian
An archaic language once spoken on Sophia, Old Sophian is one of the most difficult for off-worlders to learn; it has 4 genders, as well as flexible nouns which change gender based on their case, and verbs which take either prefixes or suffixes (or both) to indicate tense and subjectivity.
The language ceased to be official in <date>898</date>, and is now only used in the names and mottoes of organisations or companies dating to before this time.