diff --git a/web/thesauruses/kotlin/1.5/control_structures.json b/web/thesauruses/kotlin/1.5/control_structures.json
new file mode 100644
index 000000000..2fd4ebe0e
--- /dev/null
+++ b/web/thesauruses/kotlin/1.5/control_structures.json
@@ -0,0 +1,51 @@
+{
+    "meta": {
+      "language": "kotlin",
+      "language_name": "Kotlin",
+      "structure": "control_structures",
+      "language_version": "1.5"
+    },
+    "concepts": {
+      "if_conditional": {
+        "name": "If conditional",
+        "code": "if (condition) {\n    // statements\n}"
+      },
+      "if_else_conditional": {
+        "name": "If/Else conditional",
+        "code": "if (condition) {\n    // statements\n} else {\n    // statements\n}"
+      },
+      "if_elseif_conditional": {
+        "name": "If/ElseIf conditional",
+        "code": "if (condition) {\n    // statements\n} else if (condition) {\n    // statements\n}"
+      },
+      "if_elseif_else_conditional": {
+        "name": "If/ElseIf/Else conditional",
+        "code": "if (condition) {\n    // statements\n} else if (condition) {\n    // statements\n} else {\n    // statements\n}"
+      },
+      "ternary_conditional": {
+        "name": "Ternary conditional",
+        "code": "val result = if (condition) valueIfTrue else valueIfFalse"
+      },
+      "switch_statement": {
+        "name": "Switch statement",
+        "code": "when (expression) {\n    value1 -> {\n        // statements\n    }\n    value2 -> {\n        // statements\n    }\n    else -> {\n        // statements\n    }\n}"
+      },
+      "while_loop": {
+        "name": "While loop",
+        "code": "while (condition) {\n    // statements\n}"
+      },
+      "do_while_loop": {
+        "name": "Do/While loop",
+        "code": "do {\n    // statements\n} while (condition)"
+      },
+      "for_loop": {
+        "name": "For loop",
+        "code": "for (item in collection) {\n    // statements\n}"
+      },
+      "foreach_loop": {
+        "name": "Foreach loop",
+        "code": "collection.forEach { item ->\n    // statements\n}"
+      }
+    }
+  }
+   
\ No newline at end of file
diff --git a/web/thesauruses/kotlin/1.5/data_types.json b/web/thesauruses/kotlin/1.5/data_types.json
new file mode 100644
index 000000000..1c2b0ce27
--- /dev/null
+++ b/web/thesauruses/kotlin/1.5/data_types.json
@@ -0,0 +1,71 @@
+{
+    "meta": {
+      "language": "kotlin",
+      "language_name": "Kotlin",
+      "structure": "data_types",
+      "language_version": "1.5"
+    },
+    "concepts": {
+      "boolean": {
+        "name": "Boolean",
+        "code": "Boolean"
+      },
+      "signed_integer_8_bit": {
+        "name": "Signed 8-bit integer",
+        "code": "Byte"
+      },
+      "signed_integer_16_bit": {
+        "name": "Signed 16-bit integer",
+        "code": "Short"
+      },
+      "signed_integer_32_bit": {
+        "name": "Signed 32-bit integer",
+        "code": "Int"
+      },
+      "signed_integer_64_bit": {
+        "name": "Signed 64-bit integer",
+        "code": "Long"
+      },
+      "signed_integer_as_object": {
+        "name": "Signed object-based Integer",
+        "code": "Int"
+      },
+      "signed_float_16_bit": {
+        "name": "Signed 16-bit floating point",
+        "not-implemented": true
+      },
+      "signed_float_32_bit": {
+        "name": "Signed 32-bit floating point",
+        "code": "Float"
+      },
+      "signed_float_64_bit": {
+        "name": "Signed 64-bit floating point",
+        "code": "Double"
+      },
+      "signed_float_as_object": {
+        "name": "Signed object-based floating point",
+        "code": "Float"
+      },
+      "string_as_object": {
+        "name": "String as an object",
+        "code": "String"
+      },
+      "string_as_array": {
+        "name": "String as an array of characters",
+        "code": "CharArray"
+      },
+      "complex_as_object": {
+        "name": "Complex Number as an object",
+        "not-implemented": true
+      },
+      "real_number_part": {
+        "name": "Complex number real part",
+        "not-implemented": true
+      },
+      "imaginary_number_part": {
+        "name": "Complex number imaginary part",
+        "not-implemented": true
+      }
+    }
+  }
+  
\ No newline at end of file