diff --git a/dll/win32/uxtheme/lang/cs-CZ.rc b/dll/win32/uxtheme/lang/cs-CZ.rc
new file mode 100644
index 00000000000..dd41ecaff9f
--- /dev/null
+++ b/dll/win32/uxtheme/lang/cs-CZ.rc
@@ -0,0 +1,19 @@
+/*
+ * PROJECT:     ReactOS uxtheme.dll
+ * LICENSE:     LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
+ * PURPOSE:     Czech resource file
+ * TRANSLATOR:  Copyright 2024 Václav Zouzalík (Venca24) <vaclav.zouzalik@seznam.cz>
+ */
+
+LANGUAGE LANG_CZECH, SUBLANG_DEFAULT
+
+/* Strings */
+
+STRINGTABLE
+BEGIN
+    IDS_MESSAGEBOX "Okno zprávy"
+    IDS_ACTIVEWIN "Aktivní okno"
+    IDS_INACTIVEWIN "Neaktivní okno"
+    IDS_OK "OK"
+    IDS_WINTEXT "Text okna"
+END
diff --git a/dll/win32/uxtheme/lang/sk-SK.rc b/dll/win32/uxtheme/lang/sk-SK.rc
new file mode 100644
index 00000000000..4077afa3908
--- /dev/null
+++ b/dll/win32/uxtheme/lang/sk-SK.rc
@@ -0,0 +1,19 @@
+/*
+ * PROJECT:     ReactOS uxtheme.dll
+ * LICENSE:     LGPL-2.1-or-later (https://spdx.org/licenses/LGPL-2.1-or-later)
+ * PURPOSE:     Slovak resource file
+ * TRANSLATOR:  Copyright 2024 Václav Zouzalík (Venca24) <vaclav.zouzalik@seznam.cz>
+ */
+
+LANGUAGE LANG_SLOVAK, SUBLANG_DEFAULT
+
+/* Strings */
+
+STRINGTABLE
+BEGIN
+    IDS_MESSAGEBOX "Okno správy"
+    IDS_ACTIVEWIN "Aktívne okno"
+    IDS_INACTIVEWIN "Neaktívne okno"
+    IDS_OK "OK"
+    IDS_WINTEXT "Text okna"
+END
diff --git a/dll/win32/uxtheme/uxtheme.rc b/dll/win32/uxtheme/uxtheme.rc
index 041990e358c..9e1101293c0 100644
--- a/dll/win32/uxtheme/uxtheme.rc
+++ b/dll/win32/uxtheme/uxtheme.rc
@@ -19,12 +19,18 @@
 /* UTF-8 */
 #pragma code_page(65001)
 
+#ifdef LANGUAGE_CS_CZ
+    #include "lang/cs-CZ.rc"
+#endif
 #ifdef LANGUAGE_EN_US
     #include "lang/en-US.rc"
 #endif
 #ifdef LANGUAGE_RU_RU
     #include "lang/ru-RU.rc"
 #endif
+#ifdef LANGUAGE_SK_SK
+    #include "lang/sk-SK.rc"
+#endif
 #ifdef LANGUAGE_UK_UA
     #include "lang/uk-UA.rc"
 #endif