i18n: English/German from Switch system language

- Add I18n module: German when system language is DE, else English (ENUS/ENGB
  or any other language).
- Translate UI strings (tabs, settings, about, file browser, notifications,
  OC row titles, toggles Ein/Aus).
- Keep toggle/frequency/voltage list rows without subtitle descriptions
  like before.

Uses setGetSystemLanguage + setMakeLanguage; call I18n::init before
Application::init.

Made-with: Cursor

src/i18n.cpp

@@ -0,0 +1,264 @@
+/*
+    SWR INI Tool - Switchroot INI Configuration Editor
+    Copyright (C) 2026 Switchroot
+*/
+
+#include "i18n.h"
+
+#ifdef __SWITCH__
+#include <switch.h>
+#endif
+
+namespace
+{
+
+bool gGerman = false;
+
+#ifdef __SWITCH__
+void detectSystemLanguage()
+{
+    gGerman = false;
+    Result rc = setInitialize();
+    if (!R_SUCCEEDED(rc))
+        return;
+
+    u64 code = 0;
+    SetLanguage lang = SetLanguage_ENUS;
+    if (R_SUCCEEDED(setGetSystemLanguage(&code)) && R_SUCCEEDED(setMakeLanguage(code, &lang)))
+    {
+        if (lang == SetLanguage_DE)
+            gGerman = true;
+    }
+    setExit();
+}
+#endif
+
+struct Triple
+{
+    const char* key;
+    const char* en;
+    const char* de;
+};
+
+static const Triple OC_BOOL_LABEL[] = {
+    {"oc", "Overclocking", "Übertaktung"},
+    {"dvfsb", "CPU DVFS Boost", "CPU-DVFS-Boost"},
+    {"gpu_dvfsc", "GPU DVFS Scaling", "GPU-DVFS-Skalierung"},
+    {"usb3force", "Force USB 3.0", "USB 3.0 erzwingen"},
+    {"ddr200_enable", "DDR200 Enable", "DDR200 aktivieren"},
+};
+
+static const Triple OC_FREQ_LABEL[] = {
+    {"max_cpu_freq", "Max CPU Frequency", "Max. CPU-Taktfrequenz"},
+    {"max_gpu_freq", "Max GPU Frequency", "Max. GPU-Taktfrequenz"},
+    {"ram_oc", "RAM Frequency", "RAM-Taktfrequenz"},
+};
+
+static const Triple OC_VOLT_LABEL[] = {
+    {"ram_oc_vdd2", "RAM VDD2 Voltage", "RAM VDD2-Spannung"},
+    {"ram_oc_vddq", "RAM VDDQ Voltage", "RAM VDDQ-Spannung"},
+};
+
+const char* lookup(const Triple* table, size_t n, const std::string& key, const char* fallback)
+{
+    for (size_t i = 0; i < n; i++)
+    {
+        if (key == table[i].key)
+            return gGerman ? table[i].de : table[i].en;
+    }
+    return fallback;
+}
+
+} // namespace
+
+namespace I18n
+{
+
+void init()
+{
+#ifdef __SWITCH__
+    detectSystemLanguage();
+#else
+    gGerman = false;
+#endif
+}
+
+bool isGerman()
+{
+    return gGerman;
+}
+
+const char* appTitle()
+{
+    return gGerman ? "SWR INI-Tool" : "SWR INI Tool";
+}
+
+const char* tabSettings()
+{
+    return gGerman ? "Einstellungen" : "Settings";
+}
+
+const char* tabAbout()
+{
+    return gGerman ? "Über" : "About";
+}
+
+const char* wordOn()
+{
+    return gGerman ? "Ein" : "ON";
+}
+
+const char* wordOff()
+{
+    return gGerman ? "Aus" : "OFF";
+}
+
+std::string sectionEditLine(const std::string& section, const std::string& path)
+{
+    if (gGerman)
+        return "Abschnitt [" + section + "] aus " + path;
+    return "Editing section [" + section + "] from " + path;
+}
+
+const char* headerToggleOptions()
+{
+    return gGerman ? "Schalter" : "Toggle Options";
+}
+
+const char* headerFrequencySettings()
+{
+    return gGerman ? "Frequenz" : "Frequency Settings";
+}
+
+const char* headerVoltageSettings()
+{
+    return gGerman ? "Spannung" : "Voltage Settings";
+}
+
+const char* headerOther()
+{
+    return gGerman ? "Sonstiges" : "Other";
+}
+
+const char* headerIniFilePaths()
+{
+    return gGerman ? "INI-Dateipfade" : "INI File Paths";
+}
+
+const char* headerLinksAndResources()
+{
+    return gGerman ? "Links und Infos" : "Links and Resources";
+}
+
+const char* errorListItemTitleIni()
+{
+    return gGerman ? "\uE150  INI-Problem" : "\uE150  INI file not found";
+}
+
+std::string iniLoadErrorBody(const std::string& path)
+{
+    if (gGerman)
+        return "Die Datei konnte nicht geladen werden:\n" + path + "\n\n"
+               "Prüfen Sie den Pfad in den Einstellungen.";
+    return "Could not load " + path + "\n\n"
+           "Make sure the INI file exists at the expected path.\n"
+           "You can configure paths in the Settings tab.";
+}
+
+std::string iniSectionErrorBody(const std::string& path, const std::string& osName)
+{
+    if (gGerman)
+        return "Kein OS-Abschnitt in " + path + "\n\n"
+               "Die INI sollte z. B. einen Abschnitt ["
+               + osName + " OC] enthalten.";
+    return "No OS section found in " + path + "\n\n"
+           "The INI file should contain a section like\n"
+           "[" + osName + " OC] with your configuration.";
+}
+
+const char* notifyConfigSaved()
+{
+    return gGerman ? "\uE14B  Konfiguration gespeichert" : "\uE14B  Configuration saved";
+}
+
+const char* notifyConfigSaveError()
+{
+    return gGerman ? "\uE150  Fehler beim Speichern!" : "\uE150  Error saving configuration!";
+}
+
+const char* notifyPathUpdated()
+{
+    return gGerman ? "\uE14B  Pfad aktualisiert" : "\uE14B  Path updated";
+}
+
+const char* settingsIntro()
+{
+    return gGerman ? "Wählen Sie, welche INI-Datei jeder Reiter liest und schreibt.\n"
+                     "Änderungen gelten sofort."
+                   : "Select which INI file each OS tab reads and writes.\n"
+                     "Changes take effect immediately.";
+}
+
+const char* pathListDescriptionLakka()
+{
+    return gGerman ? "Tippen, um eine INI-Datei zu wählen" : "Tap to browse for an INI file";
+}
+
+const char* fileBrowserTitlePrefix()
+{
+    return gGerman ? "INI wählen \u2014 " : "Select INI \u2014 ";
+}
+
+std::string fileBrowserNoIni(const std::string& dir)
+{
+    if (gGerman)
+        return "Keine .ini-Dateien in " + dir;
+    return "No .ini files found in " + dir;
+}
+
+const char* aboutSubtitle()
+{
+    return gGerman ? "Switchroot INI-Konfiguration\n"
+                     "Linux-, Android- und Lakka-OC ohne PC bearbeiten!"
+                   : "Switchroot INI Configuration Editor\n"
+                     "Edit your Linux, Android and Lakka OC settings without a PC!";
+}
+
+const char* aboutCopyright()
+{
+    return gGerman ? "Lizenziert unter GPL-3.0\n"
+                     "UI: Borealis\n"
+                     "Basierend auf der Arbeit von Switchroot\n"
+                     "\u00A9 2026 NiklasCFW"
+                   : "Licensed under GPL-3.0\n"
+                     "Powered by Borealis UI framework\n"
+                     "Based on the work of Switchroot\n"
+                     "\u00A9 2026 NiklasCFW";
+}
+
+const char* aboutLinks()
+{
+    return gGerman ? "\uE016  NiklasCFW-Dokumentation: Anleitungen und Infos\n"
+                     "\uE016  NiklasCFW-Discord: Fragen und Community\n"
+                     "\uE016  Quellcode auf GitHub (OmniNX)"
+                   : "\uE016  NiklasCFW Docs for setup guides and documentation\n"
+                     "\uE016  NiklasCFW's Discord server for support and community\n"
+                     "\uE016  Source code available on the OmniNX GitHub";
+}
+
+const char* ocBoolLabel(const std::string& key)
+{
+    return lookup(OC_BOOL_LABEL, sizeof(OC_BOOL_LABEL) / sizeof(OC_BOOL_LABEL[0]), key, key.c_str());
+}
+
+const char* ocFreqLabel(const std::string& key)
+{
+    return lookup(OC_FREQ_LABEL, sizeof(OC_FREQ_LABEL) / sizeof(OC_FREQ_LABEL[0]), key, key.c_str());
+}
+
+const char* ocVoltageLabel(const std::string& key)
+{
+    return lookup(OC_VOLT_LABEL, sizeof(OC_VOLT_LABEL) / sizeof(OC_VOLT_LABEL[0]), key, key.c_str());
+}
+
+} // namespace I18n