|Native speakers||10 million (2020)|
|Writing system||Terminian script|
|Official language in||Kaisen|
|Regulated by||Terminian Institute for the Languages of the East|
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Kaisen or Kaiseni (žig wezanax [ʑug wɛzanɑx]) is a Milevic language spoken natively by about 10 million speakers, primarily in Kaisen. It is closely related to other Milevic languages such as Farmoshi, Sarkiki and Athsudan, although it shares a particularly close relationship to Czisilian. Since the early 1800s, Kaiseni has been regulated by the Terminian Institute for the Languages of the East, which introduced a uniform standard of spelling and pronunciation.