diff --git a/src/server/i18n.cpp b/src/server/i18n.cpp
index 2aecc724d..acde36993 100644
--- a/src/server/i18n.cpp
+++ b/src/server/i18n.cpp
@@ -111,4 +111,21 @@ std::string ParameterizedMessage::getText(const std::string& lang) const
   return i18n::expandParameterizedString(lang, msgId, params);
 }
 
+UserLangPreferences parseUserLanguagePreferences(const std::string& s)
+{
+  // TODO: implement properly
+  const UserLangPreferences defaultPref{{"en", 1}};
+
+  if ( s.empty() )
+    return defaultPref;
+
+  for ( const char c :  s ) {
+    if ( ! std::isalpha(c) ) {
+      return defaultPref;
+    }
+  }
+
+  return {{s, 1}};
+}
+
 } // namespace kiwix
diff --git a/src/server/i18n.h b/src/server/i18n.h
index d4b084d3e..c3d648f0c 100644
--- a/src/server/i18n.h
+++ b/src/server/i18n.h
@@ -89,6 +89,16 @@ private: // data
   const Parameters  params;
 };
 
+struct LangPreference
+{
+  const std::string lang;
+  const float preference;
+};
+
+typedef std::vector<LangPreference> UserLangPreferences;
+
+UserLangPreferences parseUserLanguagePreferences(const std::string& s);
+
 } // namespace kiwix
 
 #endif // KIWIX_SERVER_I18N
diff --git a/src/server/request_context.cpp b/src/server/request_context.cpp
index bf14ee783..d2898ed47 100644
--- a/src/server/request_context.cpp
+++ b/src/server/request_context.cpp
@@ -28,6 +28,7 @@
 #include <cctype>
 
 #include "tools/stringTools.h"
+#include "i18n.h"
 
 namespace kiwix {
 
@@ -64,31 +65,6 @@ fullURL2LocalURL(const std::string& full_url, const std::string& rootLocation)
   }
 }
 
-struct LangPreference
-{
-  const std::string lang;
-  const float preference;
-};
-
-typedef std::vector<LangPreference> UserLangPreferences;
-
-UserLangPreferences parseUserLanguagePreferences(const std::string& s)
-{
-  // TODO: implement properly
-  const UserLangPreferences defaultPref{{"en", 1}};
-
-  if ( s.empty() )
-    return defaultPref;
-
-  for ( const char c :  s ) {
-    if ( ! std::isalpha(c) ) {
-      return defaultPref;
-    }
-  }
-
-  return {{s, 1}};
-}
-
 } // unnamed namespace
 
 RequestContext::RequestContext(struct MHD_Connection* connection,