diff --git a/src/render/markdown.ts b/src/render/markdown.ts
index dbf5713..08a6fe6 100644
--- a/src/render/markdown.ts
+++ b/src/render/markdown.ts
@@ -46,6 +46,13 @@ import zsh from "@shikijs/langs/zsh";
 import kanagawaLotus from "@shikijs/themes/kanagawa-lotus";
 import kanagawaWave from "@shikijs/themes/kanagawa-wave";
 
+// Ignore error emitted to stderr by comark highlight plugin, when missing a language.
+const originalError = console.error;
+console.error = (...data: unknown[]) => {
+  if (data.includes("Shiki highlighting error:")) return;
+  else originalError(data);
+};
+
 export async function renderMarkdown(
   text: PromiseLike<string> | string,
   columns: number,