Validate key for conforming to style rules.

src/LocalizationFile.cpp

@@ -1,6 +1,16 @@
 #include "LocalizationFile.hpp"
 #include <fstream>
 #include <iostream>
+#include <regex>
+
+const std::regex keyChecker = std::regex("[^a-z0-9_]+");
+
+static bool IsKeyValid(const std::string_view & key){
+    if (std::regex_search(key.begin(), key.end(), keyChecker)){
+        return false;
+    }
+    return true;
+}
 
 void LocalizationFile::LoadFile(const std::filesystem::path& path) {
     if (!std::filesystem::exists(path)) {
@@ -33,6 +43,9 @@ void LocalizationFile::LoadFile(const std::filesystem::path& path) {
         std::getline(linestream, value, sep);
         if (key.empty())
             continue;
+        if (!IsKeyValid(key)){
+            std::cout << "Key not valid: '" << key << "'. Skipping key." << std::endl;
+        }
         _map[key] = value;
     }
     file.close();