diff --git a/src/android/app/src/main/res/values/arrays.xml b/src/android/app/src/main/res/values/arrays.xml
index b0487302b3..565decb390 100644
--- a/src/android/app/src/main/res/values/arrays.xml
+++ b/src/android/app/src/main/res/values/arrays.xml
@@ -64,7 +64,8 @@
         <item>@string/language_spanish</item>
         <item>@string/language_taiwanese</item>
         <item>@string/language_traditional_chinese</item>
-        <item>@string/language_serbian</item>
+        <item>@string/language_polish</item>
+        <item>@string/language_thai</item>
     </string-array>
 
     <integer-array name="languageValues">
@@ -87,6 +88,7 @@
         <item>11</item>
         <item>16</item>
         <item>18</item>
+        <item>19</item>
     </integer-array>
 
     <string-array name="rendererApiNames">
@@ -407,6 +409,7 @@
         <item>@string/app_language_persian</item>
         <item>@string/app_language_hebrew</item>
         <item>@string/app_language_serbian</item>
+        <item>@string/app_language_thai</item>
     </string-array>
     <integer-array name="appLanguageValues">
         <item>0</item>
diff --git a/src/android/app/src/main/res/values/strings.xml b/src/android/app/src/main/res/values/strings.xml
index 8a1193303e..a34d75d7cb 100644
--- a/src/android/app/src/main/res/values/strings.xml
+++ b/src/android/app/src/main/res/values/strings.xml
@@ -1011,7 +1011,8 @@
     <string name="language_simplified_chinese" translatable="false">简体中文</string>
     <string name="language_traditional_chinese" translatable="false">正體中文</string>
     <string name="language_brazilian_portuguese" translatable="false">Português do Brasil</string>
-    <string name="language_serbian" translatable="false">српски</string>
+    <string name="language_polish" translatable="false">Polska</string>
+    <string name="language_thai" translatable="false">แบบไทย</string>
 
     <!-- Memory Sizes -->
     <string name="memory_byte_shorthand">B</string>
@@ -1216,6 +1217,7 @@
     <string name="app_language_persian" translatable="false">فارسی</string>
     <string name="app_language_hebrew" translatable="false">עברית</string>
     <string name="app_language_serbian" translatable="false">Српски</string>
+    <string name="app_language_thai" translatable="false">แบบไทย</string>
 
     <!-- Static Themes -->
     <string name="static_theme_color">Theme Color</string>
diff --git a/src/common/settings_enums.h b/src/common/settings_enums.h
index d4935d9b6d..638be4127f 100644
--- a/src/common/settings_enums.h
+++ b/src/common/settings_enums.h
@@ -120,7 +120,7 @@ ENUM(AudioMode, Mono, Stereo, Surround);
 
 ENUM(Language, Japanese, EnglishAmerican, French, German, Italian, Spanish, Chinese, Korean, Dutch,
      Portuguese, Russian, Taiwanese, EnglishBritish, FrenchCanadian, SpanishLatin,
-     ChineseSimplified, ChineseTraditional, PortugueseBrazilian, Serbian);
+     ChineseSimplified, ChineseTraditional, PortugueseBrazilian, Polish, Thai);
 ENUM(Region, Japan, Usa, Europe, Australia, China, Korea, Taiwan);
 ENUM(TimeZone, Auto, Default, Cet, Cst6Cdt, Cuba, Eet, Egypt, Eire, Est, Est5Edt, Gb, GbEire, Gmt,
     GmtPlusZero, GmtMinusZero, GmtZero, Greenwich, Hongkong, Hst, Iceland, Iran, Israel, Jamaica,
diff --git a/src/core/file_sys/control_metadata.cpp b/src/core/file_sys/control_metadata.cpp
index 7ca7703afa..3676c1bbc8 100644
--- a/src/core/file_sys/control_metadata.cpp
+++ b/src/core/file_sys/control_metadata.cpp
@@ -12,6 +12,7 @@
 #include <zlib.h>
 
 #include "common/settings.h"
+#include "common/settings_enums.h"
 #include "common/string_util.h"
 #include "common/swap.h"
 #include "core/file_sys/control_metadata.h"
@@ -19,7 +20,7 @@
 
 namespace FileSys {
 
-const std::array<const char*, 16> LANGUAGE_NAMES{{
+const std::array<const char*, size_t(Language::Count)> LANGUAGE_NAMES{{
     "AmericanEnglish",
     "BritishEnglish",
     "Japanese",
@@ -36,137 +37,95 @@ const std::array<const char*, 16> LANGUAGE_NAMES{{
     "TraditionalChinese",
     "SimplifiedChinese",
     "BrazilianPortuguese",
+    "Polish",
+    "Thai",
 }};
 
-namespace {
-constexpr std::size_t LEGACY_LANGUAGE_REGION_SIZE = sizeof(std::array<LanguageEntry, 16>);
-constexpr std::size_t PACKED_LANGUAGE_REGION_MAX_SIZE = sizeof(LanguageEntry) * 32;
+namespace
+{
+    constexpr std::size_t MAX_EXPANDED_LANG_SIZE = sizeof(LanguageEntry) * 32;
 
-bool InflateRawDeflate(std::span<const u8> compressed, std::vector<u8>& out) {
-    if (compressed.empty() || compressed.size() > std::numeric_limits<uInt>::max()) {
-        return false;
-    }
 
-    z_stream stream{};
-    stream.next_in = const_cast<Bytef*>(reinterpret_cast<const Bytef*>(compressed.data()));
-    stream.avail_in = static_cast<uInt>(compressed.size());
-    if (inflateInit2(&stream, -MAX_WBITS) != Z_OK) {
-        return false;
-    }
+    bool InflateRawDeflate(std::span<const u8> compressed, std::vector<u8>& out)
+    {
+        if (compressed.empty()) return false;
 
-    std::array<u8, 0x1000> chunk{};
-    int ret = Z_OK;
-    while (ret == Z_OK) {
-        stream.next_out = reinterpret_cast<Bytef*>(chunk.data());
-        stream.avail_out = static_cast<uInt>(chunk.size());
-        ret = inflate(&stream, Z_NO_FLUSH);
-        if (ret != Z_OK && ret != Z_STREAM_END) {
-            inflateEnd(&stream);
+        z_stream stream{};
+        stream.next_in = const_cast<Bytef*>(reinterpret_cast<const Bytef*>(compressed.data()));
+        stream.avail_in = static_cast<uInt>(compressed.size());
+        if (inflateInit2(&stream, -MAX_WBITS) != Z_OK) {
             return false;
         }
 
-        const auto produced = chunk.size() - static_cast<std::size_t>(stream.avail_out);
-        if (produced != 0) {
-            if (out.size() + produced > PACKED_LANGUAGE_REGION_MAX_SIZE) {
-                inflateEnd(&stream);
-                return false;
-            }
-            out.insert(out.end(), chunk.begin(),
-                       chunk.begin() + static_cast<std::ptrdiff_t>(produced));
+        out.resize(MAX_EXPANDED_LANG_SIZE);
+        stream.next_out = reinterpret_cast<Bytef*>(out.data());
+        stream.avail_out = static_cast<uInt>(out.size());
+
+        int ret = inflate(&stream, Z_FINISH);
+        inflateEnd(&stream);
+
+        if (ret != Z_STREAM_END && ret != Z_OK) {
+            return false;
         }
+
+        // Shrink to actual decompressed size
+        out.resize(stream.total_out);
+        return true;
     }
-
-    inflateEnd(&stream);
-    return ret == Z_STREAM_END;
-}
-
-void DecodePackedLanguageEntries(RawNACP& raw) {
-    auto* packed_region = reinterpret_cast<u8*>(raw.language_entries.data());
-    u16_le compressed_size_le{};
-    std::memcpy(&compressed_size_le, packed_region, sizeof(compressed_size_le));
-    const auto compressed_size = static_cast<std::size_t>(compressed_size_le);
-
-    if (compressed_size == 0 || compressed_size > LEGACY_LANGUAGE_REGION_SIZE - sizeof(u16_le)) {
-        return;
-    }
-
-    std::vector<u8> decompressed;
-    if (!InflateRawDeflate(
-            std::span<const u8>(packed_region + sizeof(u16_le), compressed_size), decompressed)) {
-        return;
-    }
-
-    if (decompressed.size() < LEGACY_LANGUAGE_REGION_SIZE ||
-        decompressed.size() % sizeof(LanguageEntry) != 0) {
-        return;
-    }
-
-    std::memcpy(raw.language_entries.data(), decompressed.data(), LEGACY_LANGUAGE_REGION_SIZE);
-}
 } // namespace
 
 std::string LanguageEntry::GetApplicationName() const {
-    return Common::StringFromFixedZeroTerminatedBuffer(application_name.data(),
-                                                       application_name.size());
+    return Common::StringFromFixedZeroTerminatedBuffer(application_name.data(), application_name.size());
 }
 
 std::string LanguageEntry::GetDeveloperName() const {
-    return Common::StringFromFixedZeroTerminatedBuffer(developer_name.data(),
-                                                       developer_name.size());
+    return Common::StringFromFixedZeroTerminatedBuffer(developer_name.data(), developer_name.size());
 }
 
-constexpr std::array<Language, 18> language_to_codes = {{
-    Language::Japanese,
-    Language::AmericanEnglish,
-    Language::French,
-    Language::German,
-    Language::Italian,
-    Language::Spanish,
-    Language::SimplifiedChinese,
-    Language::Korean,
-    Language::Dutch,
-    Language::Portuguese,
-    Language::Russian,
-    Language::TraditionalChinese,
-    Language::BritishEnglish,
-    Language::CanadianFrench,
-    Language::LatinAmericanSpanish,
-    Language::SimplifiedChinese,
-    Language::TraditionalChinese,
-    Language::BrazilianPortuguese,
-}};
-
 NACP::NACP() = default;
 
-NACP::NACP(VirtualFile file) {
+NACP::NACP(VirtualFile file)
+{
     file->ReadObject(&raw);
-    DecodePackedLanguageEntries(raw);
+    if (raw.titles_data_format == TitleDataFormat::Compressed) {
+        const u16 compressed_size = raw.language_entries.compressed_data.buffer_size;
+        std::span<const u8> compressed_payload{raw.language_entries.compressed_data.buffer,
+                                               compressed_size};
+
+        std::vector<u8> decompressed;
+        if (InflateRawDeflate(compressed_payload, decompressed)) {
+            const size_t entry_count = decompressed.size() / sizeof(LanguageEntry);
+            language_entries.resize(entry_count);
+            std::memcpy(language_entries.data(), decompressed.data(), decompressed.size());
+        }
+    } else {
+        language_entries.resize(16);
+        std::memcpy(language_entries.data(), raw.language_entries.language_entries.data(),
+                    sizeof(raw.language_entries.language_entries));
+    }
 }
 
 NACP::~NACP() = default;
 
 const LanguageEntry& NACP::GetLanguageEntry() const {
-    Language language =
-        language_to_codes[static_cast<s32>(Settings::values.language_index.GetValue())];
+    u32 index = static_cast<u32>(Settings::values.language_index.GetValue());
 
-    {
-        const auto& language_entry = raw.language_entries.at(static_cast<u8>(language));
-        if (!language_entry.GetApplicationName().empty())
-            return language_entry;
+    if (index < language_entries.size()) {
+        return language_entries[index];
     }
 
-    for (const auto& language_entry : raw.language_entries) {
-        if (!language_entry.GetApplicationName().empty())
-            return language_entry;
+    for (const auto& entry : language_entries) {
+        return entry;
     }
 
-    return raw.language_entries.at(static_cast<u8>(Language::AmericanEnglish));
+    return language_entries.at(static_cast<u8>(Language::AmericanEnglish));
 }
 
-std::array<std::string, 16> NACP::GetApplicationNames() const {
-    std::array<std::string, 16> names{};
-    for (size_t i = 0; i < raw.language_entries.size(); ++i) {
-        names[i] = raw.language_entries[i].GetApplicationName();
+std::vector<std::string> NACP::GetApplicationNames() const {
+    std::vector<std::string> names;
+    names.reserve(language_entries.size());
+    for (const auto& entry : language_entries) {
+        names.push_back(entry.GetApplicationName());
     }
     return names;
 }
@@ -205,7 +164,7 @@ bool NACP::GetUserAccountSwitchLock() const {
 }
 
 u32 NACP::GetSupportedLanguages() const {
-    return raw.supported_languages;
+    return u32(raw.supported_languages);
 }
 
 u64 NACP::GetDeviceSaveDataSize() const {
diff --git a/src/core/file_sys/control_metadata.h b/src/core/file_sys/control_metadata.h
index bd109f783f..7b90ba235d 100644
--- a/src/core/file_sys/control_metadata.h
+++ b/src/core/file_sys/control_metadata.h
@@ -25,22 +25,176 @@ struct LanguageEntry {
     std::string GetApplicationName() const;
     std::string GetDeveloperName() const;
 };
-static_assert(sizeof(LanguageEntry) == 0x300, "LanguageEntry has incorrect size.");
+static_assert(sizeof(LanguageEntry) == 0x300);
+
+struct LanguageEntryData {
+    union {
+        // TitleDataFormat::Uncompressed (16 entries)
+        std::array<LanguageEntry, 16> language_entries;
+
+        // TitleDataFormat::Compressed (18+ entries)
+        struct {
+            u16 buffer_size;
+            u8 buffer[0x2FFE];
+        } compressed_data;
+    };
+};
+
+enum class TitleDataFormat : u8 {
+    Uncompressed = 0,
+    Compressed = 1,
+};
+
+struct ApplicationNeighborDetectionGroupConfiguration {
+    u64 group_id; ///< GroupId
+    std::array<u8, 0x10> key;
+};
+static_assert(sizeof(ApplicationNeighborDetectionGroupConfiguration) == 0x18);
+
+// NeighborDetectionClientConfiguration
+struct NeighborDetectionClientConfiguration {
+    ApplicationNeighborDetectionGroupConfiguration send_group_configuration; ///< SendGroupConfiguration
+    std::array<ApplicationNeighborDetectionGroupConfiguration, 0x10> receivable_group_configurations; ///< ReceivableGroupConfigurations
+};
+static_assert(sizeof(NeighborDetectionClientConfiguration) == 0x198);
+
+enum class ApparentPlatform : u8 {
+    NX = 0,
+    Ounce = 1,
+    Count = 2
+};
+
+enum class JitConfigurationFlag : u64 {
+    None = 0,
+    IsEnabled = 1,
+};
+
+struct JitConfiguration {
+    JitConfigurationFlag jit_configuration_flag;
+    u64 memory_size;
+};
+static_assert(sizeof(JitConfiguration) == 0x10);
+
+enum RequiredAddOnContentsSetDescriptorFlag : u16 {
+    None = 0,
+    Continue = 1
+};
+struct RequiredAddOnContentsSetDescriptor {
+    u16 index : 15;
+    RequiredAddOnContentsSetDescriptorFlag flag : 1;
+};
+static_assert(sizeof(RequiredAddOnContentsSetDescriptor) == 0x2);
+
+struct RequiredAddOnContentsSetBinaryDescriptor {
+    RequiredAddOnContentsSetDescriptor descriptors[0x20];
+};
+static_assert(sizeof(RequiredAddOnContentsSetBinaryDescriptor) == 0x40);
+
+enum class PlayReportPermission : u8 {
+    None = 0,
+    TargetMarketing = 1,
+};
+
+enum class CrashScreenshotForProd : u8 {
+    Deny  = 0,
+    Allow = 1,
+};
+
+enum class CrashScreenshotForDev : u8 {
+    Deny  = 0,
+    Allow = 1,
+};
+
+enum class ContentsAvailabilityTransitionPolicy : u8 {
+    NoPolicy = 0,
+    Stable = 1,
+    Changeable = 2,
+};
+
+struct AccessibleLaunchRequiredVersion {
+    std::array<u64, 8> application_id;
+};
+static_assert(sizeof(AccessibleLaunchRequiredVersion) == 0x40);
+
+enum class CrashReport : u8 {
+    Deny  = 0,
+    Allow = 1,
+};
+
+enum class PlayLogQueryCapability : u8 {
+    None = 0,
+    WhiteList = 1,
+    All = 2,
+};
+
+struct ApplicationControlDataConditionData {
+    u8 priority;
+    INSERT_PADDING_BYTES(7);
+    u16 aoc_index;
+    INSERT_PADDING_BYTES(6);
+};
+static_assert(sizeof(ApplicationControlDataConditionData) == 0x10);
+
+#pragma pack(push, 1)
+struct ApplicationControlDataCondition {
+    u64 type;
+    std::array<ApplicationControlDataConditionData, 0x8> data;
+    u8 count;
+};
+#pragma pack(pop)
+static_assert(sizeof(ApplicationControlDataCondition) == 0x89);
+
+// A language on the NX. These are for names and icons.
+#define NACP_LANGUAGE_LIST \
+    NACP_LANGUAGE_ELEM(AmericanEnglish, 0) \
+    NACP_LANGUAGE_ELEM(BritishEnglish, 1) \
+    NACP_LANGUAGE_ELEM(Japanese, 2) \
+    NACP_LANGUAGE_ELEM(French, 3) \
+    NACP_LANGUAGE_ELEM(German, 4) \
+    NACP_LANGUAGE_ELEM(LatinAmericanSpanish, 5) \
+    NACP_LANGUAGE_ELEM(Spanish, 6) \
+    NACP_LANGUAGE_ELEM(Italian, 7) \
+    NACP_LANGUAGE_ELEM(Dutch, 8) \
+    NACP_LANGUAGE_ELEM(CanadianFrench, 9) \
+    NACP_LANGUAGE_ELEM(Portuguese, 10) \
+    NACP_LANGUAGE_ELEM(Russian, 11) \
+    NACP_LANGUAGE_ELEM(Korean, 12) \
+    NACP_LANGUAGE_ELEM(TraditionalChinese, 13) \
+    NACP_LANGUAGE_ELEM(SimplifiedChinese, 14) \
+    NACP_LANGUAGE_ELEM(BrazilianPortuguese, 15) \
+    NACP_LANGUAGE_ELEM(Polish, 16) \
+    NACP_LANGUAGE_ELEM(Thai, 17) \
+
+enum class Language : u8 {
+#define NACP_LANGUAGE_ELEM(X, N) X = N,
+    NACP_LANGUAGE_LIST
+#undef NACP_LANGUAGE_ELEM
+    Count = 18,
+    Default = 255,
+};
+
+// Yes it's duplicated, why? Bits i guess
+enum class SupportedLanguage : u32 {
+#define NACP_LANGUAGE_ELEM(X, N) X = 1ULL << N,
+    NACP_LANGUAGE_LIST
+#undef NACP_LANGUAGE_ELEM
+};
+#undef NACP_LANGUAGE_LIST
 
 // The raw file format of a NACP file.
 struct RawNACP {
-    std::array<LanguageEntry, 16> language_entries;
+    LanguageEntryData language_entries;
     std::array<u8, 0x25> isbn;
     u8 startup_user_account;
     u8 user_account_switch_lock;
     u8 addon_content_registration_type;
     u32_le application_attribute;
-    u32_le supported_languages;
+    SupportedLanguage supported_languages;
     u32_le parental_control;
     bool screenshot_enabled;
     u8 video_capture_mode;
     bool data_loss_confirmation;
-    INSERT_PADDING_BYTES(1);
+    u8 play_log_policy;
     u64_le presence_group_id;
     std::array<u8, 0x20> rating_age;
     std::array<char, 0x10> version_string;
@@ -56,10 +210,14 @@ struct RawNACP {
     u8 logo_type;
     u8 logo_handling;
     bool runtime_add_on_content_install;
-    INSERT_PADDING_BYTES(5);
+    u8 runtime_parameter_delivery;
+    u8 appropriate_age_for_china;
+    INSERT_PADDING_BYTES(1);
+    CrashReport crash_report;
     u64_le seed_for_pseudo_device_id;
     std::array<u8, 0x41> bcat_passphrase;
-    INSERT_PADDING_BYTES(7);
+    u8 startup_user_account_option;
+    INSERT_PADDING_BYTES(6); // ReservedForUserAccountSaveDataOperation
     u64_le user_account_save_data_max_size;
     u64_le user_account_save_data_max_journal_size;
     u64_le device_save_data_max_size;
@@ -69,13 +227,28 @@ struct RawNACP {
     u64_le cache_storage_journal_size;
     u64_le cache_storage_data_and_journal_max_size;
     u16_le cache_storage_max_index;
-    INSERT_PADDING_BYTES(0x8B);
+    u8 runtime_upgrade;
+    u32_le supporting_limited_application_licenses;
+    std::array<u8, 0x8*16> play_log_queryable_application_id;
+    PlayLogQueryCapability play_log_query_capability;
+    u8 repair_flag;
+    u8 program_index;
+    u8 required_network_service_license_on_launch_flag;
     u8 app_error_code_prefix;
-    INSERT_PADDING_BYTES(1);
+    TitleDataFormat titles_data_format;
     u8 acd_index;
-    u8 apparent_platform;
-    INSERT_PADDING_BYTES(0x22F);
-    std::array<u8, 0x89> app_control_data_condition;
+    ApparentPlatform apparent_platform;
+    // NeighborDetectionClientConfiguration neighbor_detection_client_configuration;
+    // JitConfiguration jit_configuration;
+    // RequiredAddOnContentsSetBinaryDescriptor required_add_on_contents_set_binary_descriptor;
+    // PlayReportPermission play_report_permission;
+    // CrashScreenshotForProd crash_screenshot_for_prod;
+    // CrashScreenshotForDev crash_screenshot_for_dev;
+    // ContentsAvailabilityTransitionPolicy contents_availability_transition_policy;
+    // SupportedLanguage supported_language_copy; ///< TODO: add to XML generation.
+    INSERT_PADDING_BYTES(0x1EF);
+    AccessibleLaunchRequiredVersion accessible_launch_required_version;
+    ApplicationControlDataCondition application_control_data_condition; ///< Used for Switch 2 upgrade packs, which are distributed as AddOnContent titles
     u8 initial_program_index;
     INSERT_PADDING_BYTES(2);
     u32_le accessible_program_index_flags;
@@ -85,34 +258,13 @@ struct RawNACP {
     u8 has_ingame_voice_chat;
     INSERT_PADDING_BYTES(3);
     u32_le supported_extra_addon_content_flag;
-    INSERT_PADDING_BYTES(0x698);
+    u8 has_karaoke_feature;
+    INSERT_PADDING_BYTES(0x697);
     std::array<u8, 0x400> platform_specific_region;
 };
 static_assert(sizeof(RawNACP) == 0x4000, "RawNACP has incorrect size.");
 
-// A language on the NX. These are for names and icons.
-enum class Language : u8 {
-    AmericanEnglish = 0,
-    BritishEnglish = 1,
-    Japanese = 2,
-    French = 3,
-    German = 4,
-    LatinAmericanSpanish = 5,
-    Spanish = 6,
-    Italian = 7,
-    Dutch = 8,
-    CanadianFrench = 9,
-    Portuguese = 10,
-    Russian = 11,
-    Korean = 12,
-    TraditionalChinese = 13,
-    SimplifiedChinese = 14,
-    BrazilianPortuguese = 15,
-
-    Default = 255,
-};
-
-extern const std::array<const char*, 16> LANGUAGE_NAMES;
+extern const std::array<const char*, size_t(Language::Count)> LANGUAGE_NAMES;
 
 // A class representing the format used by NX metadata files, typically named Control.nacp.
 // These store application name, dev name, title id, and other miscellaneous data.
@@ -131,7 +283,7 @@ public:
     u64 GetDefaultNormalSaveSize() const;
     u64 GetDefaultJournalSaveSize() const;
     u32 GetSupportedLanguages() const;
-    std::array<std::string, 16> GetApplicationNames() const;
+    std::vector<std::string> GetApplicationNames() const;
     std::vector<u8> GetRawBytes() const;
     bool GetUserAccountSwitchLock() const;
     u64 GetDeviceSaveDataSize() const;
@@ -140,6 +292,7 @@ public:
 
 private:
     RawNACP raw{};
+    std::vector<LanguageEntry> language_entries;
 };
 
 } // namespace FileSys
diff --git a/src/core/hle/service/ns/language.cpp b/src/core/hle/service/ns/language.cpp
index d187be935a..ff5ccdd6d3 100644
--- a/src/core/hle/service/ns/language.cpp
+++ b/src/core/hle/service/ns/language.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -22,6 +25,8 @@ constexpr ApplicationLanguagePriorityList priority_list_american_english = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_british_english = {{
@@ -40,6 +45,8 @@ constexpr ApplicationLanguagePriorityList priority_list_british_english = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_japanese = {{
@@ -58,6 +65,8 @@ constexpr ApplicationLanguagePriorityList priority_list_japanese = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_french = {{
@@ -76,6 +85,8 @@ constexpr ApplicationLanguagePriorityList priority_list_french = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_german = {{
@@ -94,6 +105,8 @@ constexpr ApplicationLanguagePriorityList priority_list_german = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_latin_american_spanish = {{
@@ -112,6 +125,8 @@ constexpr ApplicationLanguagePriorityList priority_list_latin_american_spanish =
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_spanish = {{
@@ -130,6 +145,8 @@ constexpr ApplicationLanguagePriorityList priority_list_spanish = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_italian = {{
@@ -148,6 +165,8 @@ constexpr ApplicationLanguagePriorityList priority_list_italian = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_dutch = {{
@@ -166,6 +185,8 @@ constexpr ApplicationLanguagePriorityList priority_list_dutch = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_canadian_french = {{
@@ -184,6 +205,8 @@ constexpr ApplicationLanguagePriorityList priority_list_canadian_french = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_portuguese = {{
@@ -202,6 +225,8 @@ constexpr ApplicationLanguagePriorityList priority_list_portuguese = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_russian = {{
@@ -220,6 +245,8 @@ constexpr ApplicationLanguagePriorityList priority_list_russian = {{
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_korean = {{
@@ -238,6 +265,8 @@ constexpr ApplicationLanguagePriorityList priority_list_korean = {{
     ApplicationLanguage::Japanese,
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_traditional_chinese = {{
@@ -256,6 +285,8 @@ constexpr ApplicationLanguagePriorityList priority_list_traditional_chinese = {{
     ApplicationLanguage::Portuguese,
     ApplicationLanguage::Russian,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_simplified_chinese = {{
@@ -274,6 +305,8 @@ constexpr ApplicationLanguagePriorityList priority_list_simplified_chinese = {{
     ApplicationLanguage::Portuguese,
     ApplicationLanguage::Russian,
     ApplicationLanguage::Korean,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
 }};
 
 constexpr ApplicationLanguagePriorityList priority_list_brazilian_portuguese = {{
@@ -293,6 +326,43 @@ constexpr ApplicationLanguagePriorityList priority_list_brazilian_portuguese = {
     ApplicationLanguage::Korean,
     ApplicationLanguage::SimplifiedChinese,
     ApplicationLanguage::TraditionalChinese,
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::Thai,
+}};
+
+constexpr ApplicationLanguagePriorityList priority_list_thai = {{
+    ApplicationLanguage::Thai,
+    ApplicationLanguage::AmericanEnglish,
+    ApplicationLanguage::BritishEnglish,
+    ApplicationLanguage::Japanese,
+    ApplicationLanguage::French,
+    ApplicationLanguage::German,
+    ApplicationLanguage::Spanish,
+    ApplicationLanguage::Italian,
+    ApplicationLanguage::Dutch,
+    ApplicationLanguage::CanadianFrench,
+    ApplicationLanguage::Russian,
+    ApplicationLanguage::Korean,
+    ApplicationLanguage::SimplifiedChinese,
+    ApplicationLanguage::TraditionalChinese,
+    ApplicationLanguage::Polish,
+}};
+
+constexpr ApplicationLanguagePriorityList priority_list_polish = {{
+    ApplicationLanguage::Polish,
+    ApplicationLanguage::AmericanEnglish,
+    ApplicationLanguage::BritishEnglish,
+    ApplicationLanguage::Japanese,
+    ApplicationLanguage::French,
+    ApplicationLanguage::German,
+    ApplicationLanguage::Spanish,
+    ApplicationLanguage::Italian,
+    ApplicationLanguage::Dutch,
+    ApplicationLanguage::CanadianFrench,
+    ApplicationLanguage::Russian,
+    ApplicationLanguage::Korean,
+    ApplicationLanguage::SimplifiedChinese,
+    ApplicationLanguage::TraditionalChinese,
 }};
 
 const ApplicationLanguagePriorityList* GetApplicationLanguagePriorityList(
@@ -330,6 +400,10 @@ const ApplicationLanguagePriorityList* GetApplicationLanguagePriorityList(
         return &priority_list_simplified_chinese;
     case ApplicationLanguage::BrazilianPortuguese:
         return &priority_list_brazilian_portuguese;
+    case ApplicationLanguage::Polish:
+        return &priority_list_polish;
+    case ApplicationLanguage::Thai:
+        return &priority_list_thai;
     default:
         return nullptr;
     }
@@ -372,6 +446,10 @@ std::optional<ApplicationLanguage> ConvertToApplicationLanguage(
         return ApplicationLanguage::SimplifiedChinese;
     case Set::LanguageCode::PT_BR:
         return ApplicationLanguage::BrazilianPortuguese;
+    case Set::LanguageCode::TH:
+        return ApplicationLanguage::Thai;
+    case Set::LanguageCode::PL:
+        return ApplicationLanguage::Polish;
     default:
         return std::nullopt;
     }
@@ -411,6 +489,10 @@ std::optional<Set::LanguageCode> ConvertToLanguageCode(const ApplicationLanguage
         return Set::LanguageCode::ZH_HANS;
     case ApplicationLanguage::BrazilianPortuguese:
         return Set::LanguageCode::PT_BR;
+    case ApplicationLanguage::Thai:
+        return Set::LanguageCode::TH;
+    case ApplicationLanguage::Polish:
+        return Set::LanguageCode::PL;
     default:
         return std::nullopt;
     }
diff --git a/src/core/hle/service/ns/language.h b/src/core/hle/service/ns/language.h
index dad9934f2e..d86f59df49 100644
--- a/src/core/hle/service/ns/language.h
+++ b/src/core/hle/service/ns/language.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -26,6 +29,8 @@ enum class ApplicationLanguage : u8 {
     TraditionalChinese,
     SimplifiedChinese,
     BrazilianPortuguese,
+    Polish,
+    Thai,
     Count
 };
 using ApplicationLanguagePriorityList =
diff --git a/src/core/hle/service/set/settings_types.h b/src/core/hle/service/set/settings_types.h
index 7f152cb523..469b8d745c 100644
--- a/src/core/hle/service/set/settings_types.h
+++ b/src/core/hle/service/set/settings_types.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -169,6 +172,8 @@ enum class Language : u32 {
     SimplifiedCHhinese,
     TraditionalChinese,
     BrazilianPortuguese,
+    Polish,
+    Thai
 };
 
 /// This is "nn::settings::LanguageCode", which is a NUL-terminated string stored in a u64.
@@ -191,6 +196,8 @@ enum class LanguageCode : u64 {
     ZH_HANS = 0x00736E61482D687A,
     ZH_HANT = 0x00746E61482D687A,
     PT_BR = 0x00000052422D7470,
+    PL = 0x000000000000706C,
+    TH = 0x0000000000006874,
 };
 
 /// This is nn::settings::system::NotificationVolume
@@ -248,7 +255,7 @@ enum class PlatformRegion : s32 {
     Terra = 2,
 };
 
-constexpr std::array<LanguageCode, 18> available_language_codes = {{
+constexpr std::array<LanguageCode, 20> available_language_codes = {{
     LanguageCode::JA,
     LanguageCode::EN_US,
     LanguageCode::FR,
@@ -267,9 +274,11 @@ constexpr std::array<LanguageCode, 18> available_language_codes = {{
     LanguageCode::ZH_HANS,
     LanguageCode::ZH_HANT,
     LanguageCode::PT_BR,
+    LanguageCode::PL,
+    LanguageCode::TH
 }};
 
-static constexpr std::array<std::pair<LanguageCode, KeyboardLayout>, 18> language_to_layout{{
+static constexpr std::array<std::pair<LanguageCode, KeyboardLayout>, 20> language_to_layout{{
     {LanguageCode::JA, KeyboardLayout::Japanese},
     {LanguageCode::EN_US, KeyboardLayout::EnglishUs},
     {LanguageCode::FR, KeyboardLayout::French},
@@ -288,6 +297,8 @@ static constexpr std::array<std::pair<LanguageCode, KeyboardLayout>, 18> languag
     {LanguageCode::ZH_HANS, KeyboardLayout::ChineseSimplified},
     {LanguageCode::ZH_HANT, KeyboardLayout::ChineseTraditional},
     {LanguageCode::PT_BR, KeyboardLayout::Portuguese},
+    {LanguageCode::PL, KeyboardLayout::EnglishUsInternational},
+    {LanguageCode::TH, KeyboardLayout::EnglishUsInternational}
 }};
 
 /// This is nn::settings::system::AccountNotificationFlag
diff --git a/src/qt_common/config/shared_translation.cpp b/src/qt_common/config/shared_translation.cpp
index f4355197b0..9666092802 100644
--- a/src/qt_common/config/shared_translation.cpp
+++ b/src/qt_common/config/shared_translation.cpp
@@ -651,7 +651,8 @@ std::unique_ptr<ComboboxTranslationMap> ComboboxEnumeration(QObject* parent)
              PAIR(Language, ChineseSimplified, tr("Simplified Chinese")),
              PAIR(Language, ChineseTraditional, tr("Traditional Chinese (正體中文)")),
              PAIR(Language, PortugueseBrazilian, tr("Brazilian Portuguese (português do Brasil)")),
-             PAIR(Language, Serbian, tr("Serbian (српски)")),
+             PAIR(Language, Polish, tr("Polish (polska)")),
+             PAIR(Language, Thai, tr("Thai (แบบไทย)")),
          }});
     translations->insert({Settings::EnumMetadata<Settings::Region>::Index(),
                           {