diff --git a/src/public/app/services/i18n.ts b/src/public/app/services/i18n.ts
index 939fea000..80a9d6458 100644
--- a/src/public/app/services/i18n.ts
+++ b/src/public/app/services/i18n.ts
@@ -35,8 +35,9 @@ export function getAvailableLocales() {
  * @param localeId the locale ID to search for.
  * @returns the corresponding {@link Locale} or `null` if it was not found.
  */
-export function getLocaleById(localeId: string ) {
-    return locales?.find((l) => l.id === localeId);
+export function getLocaleById(localeId: string | null | undefined) {
+    if (!localeId) return null;
+    return locales?.find((l) => l.id === localeId) ?? null;
 }
 
 export const t = i18next.t;
diff --git a/src/public/app/widgets/type_widgets/read_only_text.ts b/src/public/app/widgets/type_widgets/read_only_text.ts
index 20e12fd63..3aecf9764 100644
--- a/src/public/app/widgets/type_widgets/read_only_text.ts
+++ b/src/public/app/widgets/type_widgets/read_only_text.ts
@@ -4,6 +4,7 @@ import { applySyntaxHighlight } from "../../services/syntax_highlight.js";
 import { getMermaidConfig } from "../mermaid.js";
 import type FNote from "../../entities/fnote.js";
 import type { EventData } from "../../components/app_context.js";
+import { getLocaleById } from "../../services/i18n.js";
 
 const TPL = `
 <div class="note-detail-readonly-text note-detail-printable">
@@ -100,6 +101,11 @@ export default class ReadOnlyTextTypeWidget extends AbstractTextTypeWidget {
         // (see https://github.com/zadam/trilium/issues/1590 for example of such conflict)
         await libraryLoader.requireLibrary(libraryLoader.CKEDITOR);
 
+        const languageCode = note.getLabelValue("language");
+        const correspondingLocale = getLocaleById(languageCode);
+        const isRtl = correspondingLocale?.rtl;
+        this.$content.attr("dir", isRtl ? "rtl" : "ltr");
+
         const blob = await note.getBlob();
 
         this.$content.html(blob?.content ?? "");