diff --git a/apps/web/core/components/comments/card/edit-form.tsx b/apps/web/core/components/comments/card/edit-form.tsx
index 6747df1233d..31e7f63da0f 100644
--- a/apps/web/core/components/comments/card/edit-form.tsx
+++ b/apps/web/core/components/comments/card/edit-form.tsx
@@ -71,7 +71,8 @@ export const CommentCardEditForm = observer(function CommentCardEditForm(props:
     <form className="flex flex-col gap-2">
       <div
         onKeyDown={(e) => {
-          if (e.key === "Enter" && !e.shiftKey && !e.ctrlKey && !e.metaKey && !isEmpty) handleSubmit(onEnter)(e);
+          if (e.key === "Enter" && !e.shiftKey && !e.ctrlKey && !e.metaKey && !e.nativeEvent.isComposing && !isEmpty)
+            handleSubmit(onEnter)(e);
         }}
       >
         <LiteTextEditor
diff --git a/apps/web/core/components/comments/comment-create.tsx b/apps/web/core/components/comments/comment-create.tsx
index 40381705110..b5aab71f5d0 100644
--- a/apps/web/core/components/comments/comment-create.tsx
+++ b/apps/web/core/components/comments/comment-create.tsx
@@ -94,6 +94,7 @@ export const CommentCreate = observer(function CommentCreate(props: TCommentCrea
           !e.shiftKey &&
           !e.ctrlKey &&
           !e.metaKey &&
+          !e.nativeEvent.isComposing &&
           !isEmpty &&
           !isSubmitting &&
           editorRef.current?.isEditorReadyToDiscard()
diff --git a/packages/editor/src/core/extensions/emoji/emoji.ts b/packages/editor/src/core/extensions/emoji/emoji.ts
index d61623c39a5..757460a0d83 100644
--- a/packages/editor/src/core/extensions/emoji/emoji.ts
+++ b/packages/editor/src/core/extensions/emoji/emoji.ts
@@ -375,6 +375,11 @@ export const Emoji = Node.create<EmojiOptions, EmojiStorage>({
 
         // replace text emojis with emoji node on any change
         appendTransaction: (transactions, oldState, newState) => {
+          // Skip during IME composition to avoid interfering with Chinese/Japanese/Korean input
+          if (this.editor.view.composing) {
+            return;
+          }
+
           const docChanges =
             transactions.some((transaction) => transaction.docChanged) && !oldState.doc.eq(newState.doc);
 
diff --git a/packages/editor/src/core/extensions/enter-key.ts b/packages/editor/src/core/extensions/enter-key.ts
index 854a7081361..09badc5d4f3 100644
--- a/packages/editor/src/core/extensions/enter-key.ts
+++ b/packages/editor/src/core/extensions/enter-key.ts
@@ -9,6 +9,11 @@ export const EnterKeyExtension = (onEnterKeyPress?: () => void) =>
     addKeyboardShortcuts(this) {
       return {
         Enter: () => {
+          // Don't trigger submission during IME composition (e.g., Chinese/Japanese input)
+          if (this.editor.view.composing) {
+            return false;
+          }
+
           const { activeDropbarExtensions } = this.editor.storage.utility;
 
           if (activeDropbarExtensions.length === 0) {
diff --git a/packages/editor/src/core/extensions/trailing-node.ts b/packages/editor/src/core/extensions/trailing-node.ts
index 5f9624e9698..e578b2abd6f 100644
--- a/packages/editor/src/core/extensions/trailing-node.ts
+++ b/packages/editor/src/core/extensions/trailing-node.ts
@@ -30,11 +30,17 @@ export const TrailingNode = Extension.create<TrailingNodeOptions>({
     const disabledNodes = Object.entries(this.editor.schema.nodes)
       .map(([, value]) => value)
       .filter((node) => this.options.notAfter.includes(node.name));
+    const editor = this.editor;
 
     return [
       new Plugin({
         key: plugin,
         appendTransaction: (_, __, state) => {
+          // Skip during IME composition to avoid interfering with Chinese/Japanese/Korean input
+          if (editor.view.composing) {
+            return;
+          }
+
           const { doc, tr, schema } = state;
           const shouldInsertNodeAtEnd = plugin.getState(state);
           const endPosition = doc.content.size;
diff --git a/packages/editor/src/core/extensions/unique-id/extension.ts b/packages/editor/src/core/extensions/unique-id/extension.ts
index c07ade359e6..a82776bfff4 100644
--- a/packages/editor/src/core/extensions/unique-id/extension.ts
+++ b/packages/editor/src/core/extensions/unique-id/extension.ts
@@ -131,6 +131,6 @@ export const UniqueID = Extension.create<UniqueIDOptions>({
       return [];
     }
 
-    return [createUniqueIDPlugin(this.options)];
+    return [createUniqueIDPlugin(this.options, this.editor)];
   },
 });
diff --git a/packages/editor/src/core/extensions/unique-id/plugin.ts b/packages/editor/src/core/extensions/unique-id/plugin.ts
index c7f09860b56..1e2fc03a826 100644
--- a/packages/editor/src/core/extensions/unique-id/plugin.ts
+++ b/packages/editor/src/core/extensions/unique-id/plugin.ts
@@ -1,4 +1,4 @@
-import { combineTransactionSteps, findChildrenInRange, findDuplicates, getChangedRanges } from "@tiptap/core";
+import { combineTransactionSteps, Editor, findChildrenInRange, findDuplicates, getChangedRanges } from "@tiptap/core";
 import { Fragment, Slice } from "@tiptap/pm/model";
 import type { Node as ProseMirrorNode } from "@tiptap/pm/model";
 import { Plugin, PluginKey } from "@tiptap/pm/state";
@@ -8,7 +8,7 @@ import type { UniqueIDOptions } from "./extension";
 // utils
 import { createIdsForView } from "./utils";
 
-export const createUniqueIDPlugin = (options: UniqueIDOptions) => {
+export const createUniqueIDPlugin = (options: UniqueIDOptions, editor?: Editor) => {
   let dragSourceElement: Element | null = null;
   let transformPasted = false;
   let syncHandler: (() => void) | null = null;
@@ -16,6 +16,11 @@ export const createUniqueIDPlugin = (options: UniqueIDOptions) => {
   return new Plugin({
     key: new PluginKey("uniqueID"),
     appendTransaction: (transactions, oldState, newState) => {
+      // Skip during IME composition to avoid interfering with Chinese/Japanese/Korean input
+      if (editor?.view.composing) {
+        return;
+      }
+
       const hasDocChanges =
         transactions.some((transaction) => transaction.docChanged) && !oldState.doc.eq(newState.doc);
       const filterTransactions =