Automatic translations
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On-device Translation Engine
ButterKit ships with on-device translation capabilities powered by Apple’s Translation Framework. This translation engine is free to use and capable of working entirely offline after you download the proper language packs available in macOS System Settings > General > Language & Region > Translation Languages. However, on-device translation is limited to about 19 languages as of December 2025. See full language availability below.
Cloud Model Availabilty
Most popular cloud LLM models are supported in ButterKit. You will need a Pro license and your own API Key for the model you want to use.
- OpenAI ChatGPT
- Google Gemini
- Anthropic Claude
- OpenRouter (and hundreds of additional models via OpenRouter, full list available here)
Language Availability
| Language | Code | On-device (free) | Cloud Models (bring-your-own-key) |
|---|---|---|---|
| Arabic | ar |
✅ Supported | ✅ Supported |
| Chinese (Simplified) | zh-hans |
✅ Supported | ✅ Supported |
| Chinese (Traditional) | zh-hant |
✅ Supported | ✅ Supported |
| Dutch | nl |
✅ Supported | ✅ Supported |
| French | fr |
✅ Supported | ✅ Supported |
| German | de |
✅ Supported | ✅ Supported |
| Hindi | hi |
✅ Supported | ✅ Supported |
| Indonesian | id |
✅ Supported | ✅ Supported |
| Italian | it |
✅ Supported | ✅ Supported |
| Japanese | ja |
✅ Supported | ✅ Supported |
| Korean | ko |
✅ Supported | ✅ Supported |
| Polish | pl |
✅ Supported | ✅ Supported |
| Portuguese | pt |
✅ Supported | ✅ Supported |
| Russian | ru |
✅ Supported | ✅ Supported |
| Spanish | es |
✅ Supported | ✅ Supported |
| Thai | th |
✅ Supported | ✅ Supported |
| Turkish | tr |
✅ Supported | ✅ Supported |
| Ukrainian | uk |
✅ Supported | ✅ Supported |
| Vietnamese | vi |
✅ Supported | ✅ Supported |
| All other languages | — | ❌ Not yet supported | ✅ Supported (varies by model) |
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