diff --git a/extensions/typescript-language-features/src/test/previewer.test.ts b/extensions/typescript-language-features/src/test/previewer.test.ts
index abcdace9f60..133238dfc0c 100644
--- a/extensions/typescript-language-features/src/test/previewer.test.ts
+++ b/extensions/typescript-language-features/src/test/previewer.test.ts
@@ -54,5 +54,15 @@ suite('typescript.previewer', () => {
 			'x {@link http://www.example.com/foo y [bar](http://www.example.com/bar) z');
 	});
 
+	test('Should support non-ascii characters in paramter name (#90108)', async () => {
+		assert.strictEqual(
+			tagsMarkdownPreview([
+				{
+					name: 'param',
+					text: 'parámetroConDiacríticos this will not'
+				}
+			]),
+			'*@param* `parámetroConDiacríticos` — this will not');
+	});
 });
 
diff --git a/extensions/typescript-language-features/src/utils/previewer.ts b/extensions/typescript-language-features/src/utils/previewer.ts
index f29d03189ff..3d059dca331 100644
--- a/extensions/typescript-language-features/src/utils/previewer.ts
+++ b/extensions/typescript-language-features/src/utils/previewer.ts
@@ -68,8 +68,8 @@ function getTagDocumentation(tag: Proto.JSDocTagInfo): string | undefined {
 		case 'extends':
 		case 'param':
 		case 'template':
-			const body = (tag.text || '').split(/^([\w\.]+)\s*-?\s*/);
-			if (body && body.length === 3) {
+			const body = (tag.text || '').split(/^(\S+)\s*-?\s*/);
+			if (body?.length === 3) {
 				const param = body[1];
 				const doc = body[2];
 				const label = `*@${tag.name}* \`${param}\``;