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Bad request, message: Unsupported language pair: 'ks' => 'sk'. #79
Description
Hello,
We are not providing the source_lang.
Request details:
{"target_lang":"sk","text":["\u062f\u06cc\u0648\u0627\u0646 \u063a\u0627\u0644\u0628 | kolektiv"],"preserve_formatting":"1","tag_handling":"html"}
The above request raises the exception DeepL\DeepLException with the message="Bad request, message: Unsupported language pair: 'ks' => 'sk'.".
I looked in the documentation for a list of exceptions that could be thrown, but didn't find anything related to this.
Can you please confirm if this is an issue on your end?
Thanks!
Activity
JanEbbing commentedon Jan 12, 2026
I can confirm this is an issue on our end, it seems the language detection detects a language we do not support, this should not happen. I'm checking with our research team how we can fix this
JanEbbing commentedon Jan 13, 2026
Our research team has fixed this in their codebase, along with a test so that this category of issue should no longer occur once that is deployed (sometime this week). I'll give an update here when that is the case.
JanEbbing commentedon Jan 23, 2026
This has been fixed in production :)