diff --git a/doc/en/html/about/history.html b/doc/en/html/about/history.html
index 7b3cc6301..3c4cf1d49 100644
--- a/doc/en/html/about/history.html
+++ b/doc/en/html/about/history.html
@@ -46,11 +46,11 @@ <h3 id="teraterm_5.3">YYYY.MM.DD (Ver 5.3 not released yet)</h3>
     </ul>
   </li-->
 
-  <!--li>Misc
+  <li>Misc
     <ul>
-      <li></li>
+      <li>Added Tamil.lng language file.</li>
     </ul>
-  </li-->
+  </li>
 </ul>
 
 <h3 id="teraterm_5.2">2024.2.29 (Ver 5.2)</h3>
diff --git a/doc/ja/html/about/history.html b/doc/ja/html/about/history.html
index cf5bebe97..6e971fc1d 100644
--- a/doc/ja/html/about/history.html
+++ b/doc/ja/html/about/history.html
@@ -46,11 +46,11 @@ <h3 id="teraterm_5.3">YYYY.MM.DD (Ver 5.3 not released yet)</h3>
     </ul>
   </li-->
 
-  <!--li>その他
+  <li>その他
     <ul>
-      <li></li>
+      <li>言語ファイルにタミル語(Tamil.lng)を追加した。</li>
     </ul>
-  </li-->
+  </li>
 </ul>
 
 <h3 id="teraterm_5.2">2024.2.29 (Ver 5.2)</h3>
diff --git a/installer/makelang.bat b/installer/makelang.bat
index 36f0d4e98..cc483a0d4 100644
--- a/installer/makelang.bat
+++ b/installer/makelang.bat
@@ -10,6 +10,7 @@ perl utf8_to.pl utf16le release/lang_utf8/Russian.lng release/lang_utf16le/Russi
 perl utf8_to.pl utf16le "release/lang_utf8/Simplified Chinese.lng" "release/lang_utf16le/Simplified Chinese.lng"
 perl utf8_to.pl utf16le release/lang_utf8/Spanish.lng release/lang_utf16le/Spanish.lng
 perl utf8_to.pl utf16le "release/lang_utf8/Traditional Chinese.lng" "release/lang_utf16le/Traditional Chinese.lng"
+perl utf8_to.pl utf16le "release/lang_utf8/Tamil.lng" "release/lang_utf16le/Tamil.lng"
 
 if not exist release\lang mkdir release\lang
 perl utf8_to.pl cp1252 release/lang_utf8/Default.lng release/lang/Default.lng
diff --git a/installer/release/lang_utf16le/CMakeLists.txt b/installer/release/lang_utf16le/CMakeLists.txt
index 8899199b4..f6b00701a 100644
--- a/installer/release/lang_utf16le/CMakeLists.txt
+++ b/installer/release/lang_utf16le/CMakeLists.txt
@@ -44,6 +44,7 @@ ConvertLNG(Russian.lng utf16le)
 ConvertLNG("Simplified Chinese.lng" utf16le)
 ConvertLNG(Spanish.lng utf16le)
 ConvertLNG("Traditional Chinese.lng" utf16le)
+ConvertLNG("Tamil.lng" utf16le)
 
 add_custom_target(
   ${PACKAGE_NAME} ALL
diff --git a/installer/teraterm.iss b/installer/teraterm.iss
index 16d008ba5..acdfd526e 100755
--- a/installer/teraterm.iss
+++ b/installer/teraterm.iss
@@ -108,6 +108,7 @@ Source: release\lang_utf16le\Korean.lng; DestDir: {app}\lang_utf16le; Components
 Source: release\lang_utf16le\Simplified Chinese.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: release\lang_utf16le\Spanish.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: release\lang_utf16le\Traditional Chinese.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
+Source: release\lang_utf16le\Tamil.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: ..\ttssh2\ttxssh\Release\ttxssh.dll; DestDir: {app}; Components: TTSSH; Flags: ignoreversion
 Source: release\ssh_known_hosts; DestDir: {app}; Components: TTSSH
 Source: ..\cygwin\cygterm\cygterm.cfg; DestDir: {app}; Components: cygterm
diff --git a/installer/teraterm_cmake.iss.in b/installer/teraterm_cmake.iss.in
index 6d08fcfef..75c2fe7df 100644
--- a/installer/teraterm_cmake.iss.in
+++ b/installer/teraterm_cmake.iss.in
@@ -100,6 +100,7 @@ Source: @CMAKE_INSTALL_PREFIX@\lang_utf16le\Korean.lng; DestDir: {app}\lang_utf1
 Source: @CMAKE_INSTALL_PREFIX@\lang_utf16le\Simplified Chinese.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: @CMAKE_INSTALL_PREFIX@\lang_utf16le\Spanish.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: @CMAKE_INSTALL_PREFIX@\lang_utf16le\Traditional Chinese.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
+Source: @CMAKE_INSTALL_PREFIX@\lang_utf16le\Tamil.lng; DestDir: {app}\lang_utf16le; Components: TeraTerm; Attribs: readonly; Flags: uninsremovereadonly overwritereadonly
 Source: @CMAKE_INSTALL_PREFIX@/ttxssh.dll; DestDir: {app}; Components: TTSSH; Flags: ignoreversion
 Source: @PROJECT_SOURCE_DIR@/installer\release\ssh_known_hosts; DestDir: {app}; Components: TTSSH
 Source: @CMAKE_INSTALL_PREFIX@/cygterm.cfg; DestDir: {app}; Components: cygterm