diff --git a/NEWS.md b/NEWS.md
index db385fbf..1607f932 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -20,6 +20,7 @@ Version 0.3.0
  - implement: auto generate javadoc-style docstring for functions
  - enhancement: use up/down key to navigate function parameter tooltip
  - enhancement: press esc to close function parameter tooltip
+ - enhancement: code suggestion for unicode identifiers
 
 Version 0.2.1
  - fix: crash when load last opens
diff --git a/RedPandaIDE/editor.cpp b/RedPandaIDE/editor.cpp
index 5195ca1b..1fd1e916 100644
--- a/RedPandaIDE/editor.cpp
+++ b/RedPandaIDE/editor.cpp
@@ -1004,6 +1004,56 @@ void Editor::mouseReleaseEvent(QMouseEvent *event)
     SynEdit::mouseReleaseEvent(event);
 }
 
+void Editor::inputMethodEvent(QInputMethodEvent *event)
+{
+    bool handled = false;
+    auto action = finally([this,&handled,event](){
+       if (!handled)
+           SynEdit::inputMethodEvent(event);
+    });
+    if (pMainWindow->completionPopup()->isVisible()) {
+        if (onCompletionInputMethod(event)) {
+            handled = true;
+            return;
+        }
+    } else {
+        QString s = event->commitString();
+        if (!s.isEmpty()) {
+            mLastIdCharPressed+=s.length();
+            if (pSettings->codeCompletion().enabled()
+                    && pSettings->codeCompletion().showCompletionWhileInput() ) {
+                if (mLastIdCharPressed>=1) {
+                    QString lastWord = getPreviousWordAtPositionForSuggestion(caretXY());
+                    if (!lastWord.isEmpty()) {
+                        if (CppTypeKeywords.contains(lastWord)) {
+                            return;
+                        }
+                        PStatement statement = mParser->findStatementOf(
+                                    mFilename,
+                                    lastWord,
+                                    caretY());
+                        StatementKind kind = mParser->getKindOfStatement(statement);
+                        if (kind == StatementKind::skClass
+                                || kind == StatementKind::skEnumClassType
+                                || kind == StatementKind::skEnumType
+                                || kind == StatementKind::skTypedef) {
+                            //last word is a typedef/class/struct, this is a var or param define, and dont show suggestion
+      //                      if devEditor.UseTabnine then
+      //                        ShowTabnineCompletion;
+                            return;
+                        }
+                    }
+                    setSelText(s);
+                    showCompletion(false);
+                    handled = true;
+                    return;
+                }
+
+            }
+        }
+    }
+}
+
 void Editor::copyToClipboard()
 {
     if (pSettings->editor().copySizeLimit()) {
@@ -2233,6 +2283,9 @@ bool Editor::onCompletionKeyPressed(QKeyEvent *event)
     BufferCoord pBeginPos,pEndPos;
     switch (event->key()) {
     case Qt::Key_Shift:
+    case Qt::Key_Control:
+    case Qt::Key_Meta:
+    case Qt::Key_Alt:
         //ignore it
         return true;
     case Qt::Key_Backspace:
@@ -2334,6 +2387,25 @@ bool Editor::onHeaderCompletionKeyPressed(QKeyEvent *event)
     return processed;
 }
 
+bool Editor::onCompletionInputMethod(QInputMethodEvent *event)
+{
+    bool processed = false;
+    if (!mCompletionPopup->isVisible())
+        return processed;
+    QString s=event->commitString();
+    if (!s.isEmpty()) {
+        setSelText(s);
+        BufferCoord pBeginPos,pEndPos;
+        QString phrase = getWordAtPosition(this,caretXY(),
+                                            pBeginPos,pEndPos,
+                                            WordPurpose::wpCompletion);
+        mLastIdCharPressed = phrase.length();
+        mCompletionPopup->search(phrase, false);
+        return true;
+    }
+    return processed;
+}
+
 Editor::TipType Editor::getTipType(QPoint point, BufferCoord& pos)
 {
     // Only allow in the text area...
diff --git a/RedPandaIDE/editor.h b/RedPandaIDE/editor.h
index 87a0f8bd..22a510ec 100644
--- a/RedPandaIDE/editor.h
+++ b/RedPandaIDE/editor.h
@@ -200,6 +200,7 @@ private:
 
     bool onCompletionKeyPressed(QKeyEvent* event);
     bool onHeaderCompletionKeyPressed(QKeyEvent* event);
+    bool onCompletionInputMethod(QInputMethodEvent *event);
 
     TipType getTipType(QPoint point, BufferCoord& pos);
     void cancelHint();
@@ -283,6 +284,10 @@ public:
 
 protected:
     void mouseReleaseEvent(QMouseEvent *event) override;
+
+    // QWidget interface
+protected:
+    void inputMethodEvent(QInputMethodEvent *) override;
 };
 
 QString getWordAtPosition(SynEdit* editor,
diff --git a/RedPandaIDE/parser/cppparser.cpp b/RedPandaIDE/parser/cppparser.cpp
index 872add99..f2a12c99 100644
--- a/RedPandaIDE/parser/cppparser.cpp
+++ b/RedPandaIDE/parser/cppparser.cpp
@@ -3593,8 +3593,9 @@ bool CppParser::isSpaceChar(const QChar &ch)
 
 bool CppParser::isWordChar(const QChar &ch)
 {
-    return (ch>= 'A' && ch<='Z')
-            || (ch>='a' && ch<='z')
+//    return (ch>= 'A' && ch<='Z')
+//            || (ch>='a' && ch<='z')
+    return ch.isLetter()
             || ch == '_'
             || ch == '*'
             || ch == '&';
@@ -3602,8 +3603,9 @@ bool CppParser::isWordChar(const QChar &ch)
 
 bool CppParser::isLetterChar(const QChar &ch)
 {
-    return (ch>= 'A' && ch<='Z')
-            || (ch>='a' && ch<='z')
+//    return (ch>= 'A' && ch<='Z')
+//            || (ch>='a' && ch<='z')
+    return ch.isLetter()
             || ch == '_';
 }
 
diff --git a/RedPandaIDE/parser/cpppreprocessor.cpp b/RedPandaIDE/parser/cpppreprocessor.cpp
index 6043acd2..2efae0a0 100644
--- a/RedPandaIDE/parser/cpppreprocessor.cpp
+++ b/RedPandaIDE/parser/cpppreprocessor.cpp
@@ -1000,7 +1000,10 @@ void CppPreprocessor::skipToPreprocessor()
 
 bool CppPreprocessor::isWordChar(const QChar &ch)
 {
-    if (ch=='_' || (ch>='a' && ch<='z') || (ch>='A' && ch<='Z') || (ch>='0' && ch<='9')) {
+    if (ch=='_'
+            // || (ch>='a' && ch<='z') || (ch>='A' && ch<='Z')
+            || ch.isLetter()
+            || (ch>='0' && ch<='9')) {
         return true;
     }
     return false;
@@ -1009,7 +1012,9 @@ bool CppPreprocessor::isWordChar(const QChar &ch)
 bool CppPreprocessor::isIdentChar(const QChar &ch)
 {
     if (ch=='_' || ch == '*' || ch == '&' || ch == '~' ||
-            (ch>='a' && ch<='z') || (ch>='A' && ch<='Z') || (ch>='0' && ch<='9')) {
+            ch.isLetter()
+            //(ch>='a' && ch<='z') || (ch>='A' && ch<='Z')
+            || (ch>='0' && ch<='9')) {
         return true;
     }
     return false;
@@ -1048,7 +1053,9 @@ bool CppPreprocessor::isOperatorChar(const QChar &ch)
 
 bool CppPreprocessor::isMacroIdentChar(const QChar &ch)
 {
-    return (ch>='A' && ch<='Z') || (ch>='a' && ch<='z') || ch == '_';
+    //return (ch>='A' && ch<='Z') || (ch>='a' && ch<='z')
+    return ch.isLetter()
+            || ch == '_';
 }
 
 bool CppPreprocessor::isDigit(const QChar &ch)
diff --git a/RedPandaIDE/widgets/codecompletionlistview.cpp b/RedPandaIDE/widgets/codecompletionlistview.cpp
index fca7ce4b..b85608f8 100644
--- a/RedPandaIDE/widgets/codecompletionlistview.cpp
+++ b/RedPandaIDE/widgets/codecompletionlistview.cpp
@@ -5,7 +5,6 @@
 
 CodeCompletionListView::CodeCompletionListView(QWidget *parent) : QListView(parent)
 {
-
 }
 
 void CodeCompletionListView::keyPressEvent(QKeyEvent *event)
@@ -20,7 +19,7 @@ void CodeCompletionListView::keyPressEvent(QKeyEvent *event)
     }
 }
 
-void CodeCompletionListView::focusInEvent(QFocusEvent *event)
+void CodeCompletionListView::focusInEvent(QFocusEvent *)
 {
     Editor *editor = pMainWindow->editorList()->getEditor();
     if (editor) {
diff --git a/RedPandaIDE/widgets/codecompletionlistview.h b/RedPandaIDE/widgets/codecompletionlistview.h
index d84e79ba..be5853d7 100644
--- a/RedPandaIDE/widgets/codecompletionlistview.h
+++ b/RedPandaIDE/widgets/codecompletionlistview.h
@@ -5,6 +5,7 @@
 #include <QKeyEvent>
 #include "../parser/parserutils.h"
 using KeyPressedCallback = std::function<bool (QKeyEvent *)>;
+using InputMethodCallback = std::function<bool (QInputMethodEvent*)>;
 
 class CodeCompletionListView: public QListView {
     Q_OBJECT
@@ -15,6 +16,9 @@ public:
     const KeyPressedCallback &keypressedCallback() const;
     void setKeypressedCallback(const KeyPressedCallback &newKeypressedCallback);
 
+    const InputMethodCallback &inputMethodCallback() const;
+    void setInputMethodCallback(const InputMethodCallback &newInputMethodCallback);
+
 protected:
     void keyPressEvent(QKeyEvent *event) override;
 private: