#8331 Network connection failed:Traceback (most recent call last): File

The root cause: the source_lang value sent to DeepL is not a language code that DeepL accepts. In pyVideoTrans, your "Spoken language" (source) selection must be one that the DeepL channel maps to a valid DeepL code (e.g. Simplified Chinese = ZH-HANS). The typical triggers are:

1. "Auto detect" was selected as the spoken language — DeepL requires an explicit source language, and an auto/unsupported value gets rejected.
2. The source language you picked is not covered by DeepL (e.g. a minority language), or its mapping does not exist in videotrans/languages.json.

Solutions (in order):

1. In the "Spoken" (source language) dropdown, pick the exact language the video is actually spoken in. Do not use "Auto detect" with DeepL.
2. If the detected/picked language is a minority or rare language, DeepL won't support it. Switch the payment channel to an AI LLM translator instead (DeepSeek / OpenAI / Gemini etc.) — LLMs accept the natural language name and handle rare languages far better.
3. If you are translating a common language (zh/en/ja/ko/fr/de/es...) and it still fails, verify that the source language you chose matches what DeepL lists as supported; then re-run with Clear Output checked.

If none of the above applies to your exact language pair, the problem is the code mapping itself. Please tell me:

• the exact Spoken language and Target language you selected,
• the DeepL plan (Free / Pro) and whether the API key works in the DeepL web console,
  so I can pinpoint the mapping mismatch.

Please refer to the related documentation:

• DeepL Translation
• Add new target/spoken language