Improved the localization.

- If the `LANG` variable is set to C, Steppable automatically falls back
to en-US.
- Fix argParse formatting issue.

Author: ZCG-coder

src/argParse.cpp

@@ -58,6 +58,7 @@ namespace steppable::__internals::utils
 
     void ProgramArgs::printUsage(const std::string& reason) const
     {
+        // Usage: <programName> <switches> <keywordArgs>
         std::cout << $("argParse", "91408f1e-6627-41e5-9707-d8a660c2b86b") << formats::bold << programName << reset
                   << " ";
 
@@ -66,13 +67,16 @@ namespace steppable::__internals::utils
                 std::cout << colors::brightGreen << '<' << posArg << '>' << " ";
 
         if (not switchDescriptions.empty())
+            // Siwtches
             std::cout << colors::brightGreen << $("argParse", "38f61169-17f1-4a49-870b-814745cdf4c6") << reset;
         if (not keywordArgDescriptions.empty())
+            // Keyword arguments
             std::cout << colors::brightGreen << $("argParse", "4f332974-1fd1-43eb-bbbc-8d32071ed735") << reset;
         std::cout << '\n';
 
         if (not posArgDescriptions.empty())
         {
+            // Available positional arguments
             std::cout << formats::bold << $("argParse", "5d482eea-c4e4-4c4d-89f0-6b33fcc9618c") << reset << '\n';
             for (const auto& [posArgName, posArgDescription] : posArgDescriptions)
             {
@@ -87,18 +91,22 @@ namespace steppable::__internals::utils
 
         if (not switchDescriptions.empty())
         {
+            // Available switches
             std::cout << formats::bold << $("argParse", "10b1c33b-070f-4dfb-be12-a1a4349e76bc") << reset << '\n';
             for (const auto& [switchName, switchDescription] : switchDescriptions)
             {
                 std::cout << colors::brightGreen << formats::bold << '[' << '-' << switchName << "] ";
                 std::cout << '[' << '+' << switchName << "]" << reset << '\n';
-                std::cout << $("argParse", "227375c6-6ec8-479e-ad39-59f975272c6b") << switchDescription << '\n';
+
+                // Enables/Disables {0}.
+                std::cout << $("argParse", "227375c6-6ec8-479e-ad39-59f975272c6b", { switchDescription }) << '\n';
             }
             std::cout << reset << '\n';
         }
 
         if (not keywordArgDescriptions.empty())
         {
+            // Available keyword arguments
             std::cout << formats::bold << $("argParse", "be2d8c84-0dfc-4f52-b450-e34d1cf20c91") << reset << '\n';
             for (const auto& [keywordArgName, keywordArgDescription] : keywordArgDescriptions)
             {
@@ -117,27 +125,31 @@ namespace steppable::__internals::utils
 
         // Print the footnote only if there are positional arguments that require a number
         if (std::ranges::any_of(posArgIsNumber, [](const bool isNumber) { return isNumber; }))
+            // Requires number
             std::cout << $("argParse", "fd67fddb-ca42-4a79-b852-c0bc71aa9969") << "\n";
         programSafeExit(-1);
     }
 
     std::string ProgramArgs::getPosArg(const size_t index) const
     {
         if (posArgs.size() <= index)
+            // Invalid positional argument
             printUsage($("argParse", "b782de55-513d-4eda-b068-98d2d6210603") + std::to_string(index));
         return posArgs[index];
     }
 
     int ProgramArgs::getKeywordArgument(const std::string& name)
     {
         if (not keywordArgs.contains(name))
+            // Invalid keyword argument
             printUsage($("argParse", "aa26a7f2-0949-454e-b987-42b40348e104") + name);
         return keywordArgs[name];
     }
 
     bool ProgramArgs::getSwitch(const std::string& name)
     {
         if (not switches.contains(name))
+            // Invalid switch
             printUsage($("argParse", "2b854b9f-da27-483e-a016-0eb0d26eb9e9") + name);
         return switches[name];
     }
@@ -177,6 +189,7 @@ namespace steppable::__internals::utils
             {
                 if (not numUtils::isNumber(_arg) and posArgIsNumber[posArgs.size()])
                 {
+                    // Positional argument is not a number.
                     output::error("ProgramArgs::parseArgs"s,
                                   $("argParse", "34782921-b560-4706-a2c9-d5c326af2cff", { _arg }));
                     programSafeExit(-1);

src/getString.cpp

@@ -71,7 +71,7 @@ namespace steppable::localization
         // The languages may be in xx_YY format. We need to convert it to xx-YY format.
         std::ranges::replace(lang, '_', '-');
         // We cannot find the language, so we return "en-US" as the default language.
-        if (lang.empty())
+        if (lang.empty() or lang == "C")
             lang = "en-US";
         return lang;
     }
@@ -114,10 +114,10 @@ namespace steppable::localization
         {
             // LINE FORMAT
             // key >> "string"
-            if (line.front() == '#')
-                continue; // Skip comments
             if (line.empty())
                 continue; // Skip empty lines
+            if (line.front() == '#')
+                continue; // Skip comments
             // Get the key and the string
             if (std::regex_match(line, STRING_REGEX))
             {