4 files changed, 9 insertions, 9 deletions
diff --git a/src/utils/stringutils.cpp b/src/utils/stringutils.cpp
index f47f724a8..e7b850510 100644
--- a/src/utils/stringutils.cpp
+++ b/src/utils/stringutils.cpp
@@ -283,7 +283,7 @@ std::string removeSpriteIndex(std::string str)
     return str;
 }
 
-const char* getSafeUtf8String(std::string text)
+const char* getSafeUtf8String(const std::string &text)
 {
     const size_t sz = text.size();
     const size_t size = sz + UTF8_MAX_SIZE;
diff --git a/src/utils/stringutils.h b/src/utils/stringutils.h
index 7cf924d98..cd04006ef 100644
--- a/src/utils/stringutils.h
+++ b/src/utils/stringutils.h
@@ -149,7 +149,7 @@ std::string extractNameFromSprite(std::string str) A_WARN_UNUSED;
 
 std::string removeSpriteIndex(std::string str) A_WARN_UNUSED;
 
-const char* getSafeUtf8String(std::string text) A_WARN_UNUSED;
+const char* getSafeUtf8String(const std::string &text) A_WARN_UNUSED;
 
 void getSafeUtf8String(std::string text, char *const buf);
 
diff --git a/src/utils/translation/poparser.cpp b/src/utils/translation/poparser.cpp
index c105bf0da..bcb577f84 100644
--- a/src/utils/translation/poparser.cpp
+++ b/src/utils/translation/poparser.cpp
@@ -42,7 +42,7 @@ PoParser::PoParser() :
 {
 }
 
-void PoParser::openFile(std::string name)
+void PoParser::openFile(const std::string &name)
 {
     const ResourceManager *const resman = ResourceManager::getInstance();
     if (!resman)
@@ -228,14 +228,14 @@ PoDict *PoParser::getEmptyDict()
     return new PoDict("");
 }
 
-bool PoParser::checkLang(std::string lang)
+bool PoParser::checkLang(const std::string &lang)
 {
     // check is po file exists
     const ResourceManager *const resman = ResourceManager::getInstance();
     return resman->exists(getFileName(lang));
 }
 
-std::string PoParser::getFileName(std::string lang)
+std::string PoParser::getFileName(const std::string &lang)
 {
     // get po file name from lang name
 //    logger->log("getFileName: translations/%s.po", lang.c_str());
diff --git a/src/utils/translation/poparser.h b/src/utils/translation/poparser.h
index 41598442b..d57dde061 100644
--- a/src/utils/translation/poparser.h
+++ b/src/utils/translation/poparser.h
@@ -39,15 +39,15 @@ class PoParser final
                      const std::string &restrict fileName = "",
                      PoDict *restrict const dict = nullptr);
 
-        static bool checkLang(std::string lang);
+        static bool checkLang(const std::string &lang);
 
         static PoDict *getEmptyDict();
 
     private:
-        void setLang(std::string lang)
+        void setLang(const std::string &lang)
         { mLang = lang; }
 
-        void openFile(std::string name);
+        void openFile(const std::string &name);
 
         bool readLine();
 
@@ -57,7 +57,7 @@ class PoParser final
 
         bool checkLine() const;
 
-        static std::string getFileName(std::string lang);
+        static std::string getFileName(const std::string &lang);
 
         PoDict *getDict() const;