Question about Encoding option of LLM Chat Prompter

junyong · December 11, 2025, 7:00am

Hi everyone.

I’m making AI Agent using KNIME’s LLM Chat Prompter. And I’m working in Korea, so I’d like to send questions in Korean and get answers in Korean. However, when I use Korean in the LLM Chat Prompter node, the encoding is broken.

Is there any option to change encoding of this node in “cp949” or any other solution?

Thank you for read.

seray_arslan · January 8, 2026, 3:19pm

Hi @junyong and welcome to the forum!

Are you using Windows 10? I tried reproducing the issue on macOS using OpenAI’s GPT-5, o4-mini, and Gemini 2.5 Pro, but did not encounter any encoding issues.

If you’re on Windows 10, could you check if you have Korean language pack installed on your system? It is described here how to do it. You’ll need to restart your computer after downloading the language pack.

If you’re not on Windows, could give us more details on:

LLM you used
KNIME AP version you’re using

This will help us investigate the issue better. Thanks!

mlauber71 · January 8, 2026, 7:55pm

@junyong on my M1 Mac I can ask questions in Korean (using ChatGPT to get the initial instructions and questions). I use Ollama and gpt-oss. So it indeed might be a problem with character set. KNIME and Mac should support UTF-8.