You can change ChatGPT's language in two ways: change the interface language in Settings, or tell ChatGPT which language to respond in. Here's how to do both.
This is one of those things that should be obvious but somehow isn't. I've seen people struggle with this for weeks before finding the right setting, so let me save you the trouble.
Change the Interface Language
The interface language controls menus, buttons, and system text - everything except ChatGPT's actual responses.
- Click your profile icon
- Go to Settings
- Click General
- Find Language
- Select your preferred language from the dropdown
Make ChatGPT Respond in a Specific Language
You've got two options here.
Option 1: Per-conversation. Just include it in your prompt: "Explain how solar panels work. Respond in Portuguese."
Option 2: Permanent setting. Go to Settings > Personalization > Custom Instructions and add: "Always respond in [language]." This applies to every new conversation.
The Custom Instructions method is what I'd recommend if you always want responses in a specific language. Saves you from typing the same thing over and over.
Mixed-Language Conversations
Yes, this works. You can ask a question in English and get the answer in Spanish - or any combination. ChatGPT handles code-switching pretty well. Just tell it what you want: "I'll ask questions in English, but always answer in French."
Language Quality Ratings
Not all languages are equal in ChatGPT. The model was trained on more English data than anything else, so English gets the best results. Here's my honest assessment based on regular testing.
| Language | Quality | Notes |
|---|---|---|
| English | Excellent | Best overall quality, most training data |
| Español (Spanish) | Excellent | Very strong, natural-sounding output |
| Français (French) | Excellent | High quality, handles formal/informal well |
| Deutsch (German) | Excellent | Strong grammar and vocabulary |
| Português (Portuguese) | Very Good | Good for both BR and PT variants |
| Bahasa Melayu | Good | Solid for everyday use, some phrasing issues |
| Bahasa Indonesia | Good | Similar quality to Malay, widely usable |
| Hindi (हिन्दी) | Good | Good comprehension, occasional phrasing quirks |
| Arabic (العربية) | Good | RTL supported, MSA strongest, dialects vary |
| Japanese (日本語) | Good | Handles kanji well, keigo (politeness) can be off |
| Korean (한국어) | Good | Solid overall, honorifics mostly correct |
| Thai (ไทย) | Fair | Usable but less polished than major languages |
| Vietnamese (Tiếng Việt) | Fair | Basic conversations good, complex topics weaker |
| Tagalog/Filipino | Fair | Understands well, responses can feel stiff |
Bottom line: if your language is in the "Excellent" or "Very Good" tier, you'll barely notice a difference from English. "Good" languages work well for most tasks but might sound slightly unnatural in creative writing. "Fair" languages are usable but I'd double-check important outputs.
Right-to-Left (RTL) Language Support
ChatGPT supports Arabic, Hebrew, Farsi, and other RTL languages. The text output displays in the correct right-to-left direction. However, the ChatGPT interface itself (sidebar, menus, buttons) stays left-to-right. It's not a full RTL experience, but the actual conversations work fine.
Tips for Better Non-English Results
If you're not getting great results in your language, try these tricks:
- Write your prompt in your target language (not English)
- Be specific about dialect or regional variant ("Brazilian Portuguese" vs "European Portuguese")
- For formal documents, mention the formality level you need
- Use follow-up prompts to correct tone or phrasing
Having trouble accessing these settings? Check our login guide or error troubleshooting if something's not working.