Verified answer
How many languages does Control Resonant support?
Quick answer
Steam lists 15 languages for interface and subtitles. Eight of those are currently marked for full audio.
What this means
The text matrix covers English, French, Italian, German, Spanish from Spain, Japanese, Korean, Polish, Brazilian Portuguese, Russian, Simplified and Traditional Chinese, Ukrainian, Latin American Spanish, and Turkish.
Official source
Steam — language support matrix
Continue with the relevant guide
Open the related Control Resonant guide for the current topic summary, connected systems, and any later verified changes.
This answer is reviewed against pre-release official information. It states unknown boundaries explicitly and will be revised when Remedy or a first-party store publishes a newer fact.