entry/unknown-language

A code block names a language that no grammar highlights, so it is shown as plain text. yuanme reads Shiki’s language names and aliases, Org’s own names such as elisp and C, and jupyter-X as X. text, none, fundamental and example are plain text with no warning.

Example

```pyhton
print(1)

## Fix

Correct the name, here `python`, or write `text` for a block that is meant to be plain.