diff --git a/lingucomponent/source/hyphenator/hyphen/hyphenimp.cxx b/lingucomponent/source/hyphenator/hyphen/hyphenimp.cxx
index 4007c1b42555..f2e311b1a432 100644
--- a/lingucomponent/source/hyphenator/hyphen/hyphenimp.cxx
+++ b/lingucomponent/source/hyphenator/hyphen/hyphenimp.cxx
@@ -123,8 +123,8 @@ Sequence< Locale > SAL_CALL Hyphenator::getLocales()
         // new configuration entries).
         std::vector< SvtLinguConfigDictionaryEntry > aDics;
         uno::Sequence< OUString > aFormatList;
-        aLinguCfg.GetSupportedDictionaryFormatsFor( "Hyphenators",
-                "org.openoffice.lingu.LibHnjHyphenator", aFormatList );
+        aLinguCfg.GetSupportedDictionaryFormatsFor( u"Hyphenators"_ustr,
+                u"org.openoffice.lingu.LibHnjHyphenator"_ustr, aFormatList );
         for (const auto& rFormat : aFormatList)
         {
             std::vector< SvtLinguConfigDictionaryEntry > aTmpDic(
@@ -961,7 +961,7 @@ void SAL_CALL Hyphenator::removeEventListener( const Reference< XEventListener >
 // Service specific part
 OUString SAL_CALL Hyphenator::getImplementationName()
 {
-    return "org.openoffice.lingu.LibHnjHyphenator";
+    return u"org.openoffice.lingu.LibHnjHyphenator"_ustr;
 }
 
 sal_Bool SAL_CALL Hyphenator::supportsService( const OUString& ServiceName )
diff --git a/lingucomponent/source/languageguessing/guesslang.cxx b/lingucomponent/source/languageguessing/guesslang.cxx
index e88cd997caa0..8069071531a5 100644
--- a/lingucomponent/source/languageguessing/guesslang.cxx
+++ b/lingucomponent/source/languageguessing/guesslang.cxx
@@ -296,7 +296,7 @@ void SAL_CALL LangGuess_Impl::enableLanguages(
 
 OUString SAL_CALL LangGuess_Impl::getImplementationName(  )
 {
-    return "com.sun.star.lingu2.LanguageGuessing";
+    return u"com.sun.star.lingu2.LanguageGuessing"_ustr;
 }
 
 sal_Bool SAL_CALL LangGuess_Impl::supportsService( const OUString& ServiceName )
@@ -306,7 +306,7 @@ sal_Bool SAL_CALL LangGuess_Impl::supportsService( const OUString& ServiceName )
 
 Sequence<OUString> SAL_CALL LangGuess_Impl::getSupportedServiceNames(  )
 {
-    return { "com.sun.star.linguistic2.LanguageGuessing" };
+    return { u"com.sun.star.linguistic2.LanguageGuessing"_ustr };
 }
 
 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
diff --git a/lingucomponent/source/lingutil/lingutil.cxx b/lingucomponent/source/lingutil/lingutil.cxx
index c737698417c5..2057b54c3612 100644
--- a/lingucomponent/source/lingutil/lingutil.cxx
+++ b/lingucomponent/source/lingutil/lingutil.cxx
@@ -207,7 +207,7 @@ std::vector< SvtLinguConfigDictionaryEntry > GetOldStyleDics( const char *pDicTy
 #ifndef IOS
     // follow the hunspell tool's example and check DICPATH for preferred dictionaries
     rtl_uString * pSearchPath = nullptr;
-    osl_getEnvironment(OUString("DICPATH").pData, &pSearchPath);
+    osl_getEnvironment(u"DICPATH"_ustr.pData, &pSearchPath);
 
     if (pSearchPath)
     {
diff --git a/lingucomponent/source/numbertext/numbertext.cxx b/lingucomponent/source/numbertext/numbertext.cxx
index b87b2cc5fc1e..dda2899415d7 100644
--- a/lingucomponent/source/numbertext/numbertext.cxx
+++ b/lingucomponent/source/numbertext/numbertext.cxx
@@ -145,7 +145,7 @@ uno::Sequence<Locale> SAL_CALL NumberText_Impl::getAvailableLanguages()
 
 OUString SAL_CALL NumberText_Impl::getImplementationName()
 {
-    return "com.sun.star.lingu2.NumberText";
+    return u"com.sun.star.lingu2.NumberText"_ustr;
 }
 
 sal_Bool SAL_CALL NumberText_Impl::supportsService(const OUString& ServiceName)
@@ -155,7 +155,7 @@ sal_Bool SAL_CALL NumberText_Impl::supportsService(const OUString& ServiceName)
 
 Sequence<OUString> SAL_CALL NumberText_Impl::getSupportedServiceNames()
 {
-    return { "com.sun.star.linguistic2.NumberText" };
+    return { u"com.sun.star.linguistic2.NumberText"_ustr };
 }
 
 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
diff --git a/lingucomponent/source/spellcheck/languagetool/languagetoolimp.cxx b/lingucomponent/source/spellcheck/languagetool/languagetoolimp.cxx
index ed8586dd50a5..e50e96e4fb05 100644
--- a/lingucomponent/source/spellcheck/languagetool/languagetoolimp.cxx
+++ b/lingucomponent/source/spellcheck/languagetool/languagetoolimp.cxx
@@ -83,7 +83,7 @@ PropertyValue lcl_GetLineColorPropertyFromErrorId(const std::string& rErrorId)
         constexpr Color COL_ORANGE(0xD1, 0x68, 0x20);
         aColor = COL_ORANGE;
     }
-    return comphelper::makePropertyValue("LineColor", aColor);
+    return comphelper::makePropertyValue(u"LineColor"_ustr, aColor);
 }
 
 OString encodeTextForLT(const OUString& text)
@@ -346,8 +346,9 @@ uno::Sequence<Locale> SAL_CALL LanguageToolGrammarChecker::getLocales()
         aLocaleList.getArray()[2] = "en-GB";
     }
     else
-        aLinguCfg.GetLocaleListFor("GrammarCheckers",
-                                   "org.openoffice.lingu.LanguageToolGrammarChecker", aLocaleList);
+        aLinguCfg.GetLocaleListFor(u"GrammarCheckers"_ustr,
+                                   u"org.openoffice.lingu.LanguageToolGrammarChecker"_ustr,
+                                   aLocaleList);
 
     auto nLength = aLocaleList.getLength();
     m_aSuppLocales.realloc(nLength);
@@ -494,7 +495,7 @@ OUString SAL_CALL LanguageToolGrammarChecker::getServiceDisplayName(const Locale
 
 OUString SAL_CALL LanguageToolGrammarChecker::getImplementationName()
 {
-    return "org.openoffice.lingu.LanguageToolGrammarChecker";
+    return u"org.openoffice.lingu.LanguageToolGrammarChecker"_ustr;
 }
 
 sal_Bool SAL_CALL LanguageToolGrammarChecker::supportsService(const OUString& ServiceName)
diff --git a/lingucomponent/source/spellcheck/spell/sspellimp.cxx b/lingucomponent/source/spellcheck/spell/sspellimp.cxx
index 468c9066aea0..7c94ad1ef98d 100644
--- a/lingucomponent/source/spellcheck/spell/sspellimp.cxx
+++ b/lingucomponent/source/spellcheck/spell/sspellimp.cxx
@@ -118,8 +118,8 @@ Sequence< Locale > SAL_CALL SpellChecker::getLocales()
         // new configuration entries).
         std::vector< SvtLinguConfigDictionaryEntry > aDics;
         uno::Sequence< OUString > aFormatList;
-        aLinguCfg.GetSupportedDictionaryFormatsFor( "SpellCheckers",
-                "org.openoffice.lingu.MySpellSpellChecker", aFormatList );
+        aLinguCfg.GetSupportedDictionaryFormatsFor( u"SpellCheckers"_ustr,
+                u"org.openoffice.lingu.MySpellSpellChecker"_ustr, aFormatList );
         for (auto const& format : aFormatList)
         {
             std::vector< SvtLinguConfigDictionaryEntry > aTmpDic(
@@ -141,7 +141,7 @@ Sequence< Locale > SAL_CALL SpellChecker::getLocales()
         if (!aDics.empty())
         {
             uno::Reference< lang::XMultiServiceFactory > xServiceFactory(comphelper::getProcessServiceFactory());
-            uno::Reference< ucb::XSimpleFileAccess > xAccess(xServiceFactory->createInstance("com.sun.star.ucb.SimpleFileAccess"), uno::UNO_QUERY);
+            uno::Reference< ucb::XSimpleFileAccess > xAccess(xServiceFactory->createInstance(u"com.sun.star.ucb.SimpleFileAccess"_ustr), uno::UNO_QUERY);
             // get supported locales from the dictionaries-to-use...
             std::set<OUString> aLocaleNamesSet;
             for (auto const& dict : aDics)
@@ -621,7 +621,7 @@ void SAL_CALL SpellChecker::removeEventListener( const Reference< XEventListener
 // Service specific part
 OUString SAL_CALL SpellChecker::getImplementationName()
 {
-    return "org.openoffice.lingu.MySpellSpellChecker";
+    return u"org.openoffice.lingu.MySpellSpellChecker"_ustr;
 }
 
 sal_Bool SAL_CALL SpellChecker::supportsService( const OUString& ServiceName )
diff --git a/lingucomponent/source/thesaurus/libnth/nthesimp.cxx b/lingucomponent/source/thesaurus/libnth/nthesimp.cxx
index 6ae5ad0a76b7..e20c0fc74d7e 100644
--- a/lingucomponent/source/thesaurus/libnth/nthesimp.cxx
+++ b/lingucomponent/source/thesaurus/libnth/nthesimp.cxx
@@ -106,8 +106,8 @@ Sequence< Locale > SAL_CALL Thesaurus::getLocales()
         // get list of dictionaries-to-use
         std::vector< SvtLinguConfigDictionaryEntry > aDics;
         uno::Sequence< OUString > aFormatList;
-        aLinguCfg.GetSupportedDictionaryFormatsFor( "Thesauri",
-                "org.openoffice.lingu.new.Thesaurus", aFormatList );
+        aLinguCfg.GetSupportedDictionaryFormatsFor( u"Thesauri"_ustr,
+                u"org.openoffice.lingu.new.Thesaurus"_ustr, aFormatList );
         for (const auto& rFormat : aFormatList)
         {
             std::vector< SvtLinguConfigDictionaryEntry > aTmpDic(
@@ -547,7 +547,7 @@ void SAL_CALL Thesaurus::removeEventListener( const Reference< XEventListener >&
 // Service specific part
 OUString SAL_CALL Thesaurus::getImplementationName()
 {
-    return "org.openoffice.lingu.new.Thesaurus";
+    return u"org.openoffice.lingu.new.Thesaurus"_ustr;
 }
 
 sal_Bool SAL_CALL Thesaurus::supportsService( const OUString& ServiceName )