diff --git a/app/src/protyle/preview/index.ts b/app/src/protyle/preview/index.ts
index d921c05ae..f91e2f84e 100644
--- a/app/src/protyle/preview/index.ts
+++ b/app/src/protyle/preview/index.ts
@@ -193,7 +193,7 @@ export class Preview {
                 processRender(protyle.preview.previewElement);
                 highlightRender(protyle.preview.previewElement);
                 avRender(protyle.preview.previewElement, protyle);
-                speechRender(protyle.preview.previewElement, protyle.options.lang);
+                speechRender(protyle.preview.previewElement, window.siyuan.config.appearance.lang);
                 protyle.preview.previewElement.scrollTop = oldScrollTop;
                 loadingElement.remove();
             });
diff --git a/app/src/types/protyle.d.ts b/app/src/types/protyle.d.ts
index c7d023749..411d3b8e2 100644
--- a/app/src/types/protyle.d.ts
+++ b/app/src/types/protyle.d.ts
@@ -472,9 +472,6 @@ interface IProtyleOptions {
     _lutePath?: string;
     /** 是否启用打字机模式。默认值: false */
     typewriterMode?: boolean;
-    /** 多语言。默认值: 'zh_CN' */
-    lang?: string;
-    /** @link https://ld246.com/article/1549638745630#options-toolbar */
     toolbar?: Array<string | IMenuItem>;
     /** @link https://ld246.com/article/1549638745630#options-preview */
     preview?: IPreview;