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diff --git a/sw/source/uibase/inc/langhelper.hxx b/sw/source/uibase/inc/langhelper.hxx
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+++ b/sw/source/uibase/inc/langhelper.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_SW_SOURCE_UIBASE_INC_LANGHELPER_HXX
+#define INCLUDED_SW_SOURCE_UIBASE_INC_LANGHELPER_HXX
+
+#include <sal/types.h>
+#include <rtl/ustring.hxx>
+#include <i18nlangtag/lang.h>
+
+class SwWrtShell;
+class SwView;
+class EditEngine;
+class EditView;
+class OutlinerView;
+class SfxItemSet;
+class SfxRequest;
+struct ESelection;
+enum class SvtScriptType : sal_uInt8;
+
+namespace SwLangHelper
+{
+    extern void GetLanguageStatus( OutlinerView* pOLV, SfxItemSet& rSet );
+    extern bool SetLanguageStatus( OutlinerView* pOLV, SfxRequest &rReq, SwView const &rView, SwWrtShell &rSh );
+
+    extern void SetLanguage( SwWrtShell &rWrtSh, std::u16string_view rLangText, bool bIsForSelection, SfxItemSet &rCoreSet );
+    extern void SetLanguage( SwWrtShell &rWrtSh, OutlinerView const * pOLV, const ESelection& rSelection, std::u16string_view rLangText, bool bIsForSelection, SfxItemSet &rCoreSet );
+    extern void SetLanguage_None( SwWrtShell &rWrtSh, bool bIsForSelection, SfxItemSet &rCoreSet );
+    extern void SetLanguage_None( SwWrtShell &rWrtSh, OutlinerView const * pOLV, const ESelection& rSelection, bool bIsForSelection, SfxItemSet &rCoreSet  );
+    extern void ResetLanguages( SwWrtShell &rWrtSh, OutlinerView const * pOLV = nullptr );
+
+    // document
+    extern void SelectCurrentPara( SwWrtShell &rWrtSh );
+    // EditView
+    extern void SelectPara( EditView &rEditView, const ESelection &rCurSel );
+
+    extern OUString GetTextForLanguageGuessing(EditEngine const * rEditEngine, const ESelection& rDocSelection);
+    extern OUString GetTextForLanguageGuessing(SwWrtShell const &rSh);
+
+    extern LanguageType GetLanguage( SfxItemSet const & aSet, TypedWhichId<SvxLanguageItem> nLangWhichId );
+    extern LanguageType GetLanguage( SwWrtShell &rSh, TypedWhichId<SvxLanguageItem> nLangWhichId );
+
+    extern LanguageType GetCurrentLanguage( SfxItemSet const & aSet, SvtScriptType nScriptType );
+    extern LanguageType GetCurrentLanguage( SwWrtShell &rSh );
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */