diff --git a/types/franc/franc-tests.ts b/types/franc/franc-tests.ts
new file mode 100644
index 0000000000..cb687e1001
--- /dev/null
+++ b/types/franc/franc-tests.ts
@@ -0,0 +1,14 @@
+import detect = require('franc');
+
+const testText = 'This is an example sentence';
+const testOptions = {
+    minLength: 3,
+    whitelist: ['eng'],
+    blacklist: [],
+};
+
+detect(testText);
+detect(testText, testOptions);
+
+detect.all(testText);
+detect.all(testText, testOptions)[0];
diff --git a/types/franc/index.d.ts b/types/franc/index.d.ts
new file mode 100644
index 0000000000..613c46946f
--- /dev/null
+++ b/types/franc/index.d.ts
@@ -0,0 +1,24 @@
+// Type definitions for franc 4.0
+// Project: https://github.com/wooorm/franc/
+// Definitions by: William LeGate <https://github.com/wlegate>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+// ISO 639-3 code (see: https://iso639-3.sil.org/code_tables/639/data)
+type ISO6393 = string;
+
+// Range [0, 1]
+type Confidence = number;
+
+interface Options {
+    minLength?: number;
+    whitelist?: ISO6393[];
+    blacklist?: ISO6393[];
+}
+
+declare function detect(text: string, options?: Options): ISO6393;
+
+declare namespace detect {
+    function all(text: string, options?: Options): [ISO6393, number];
+}
+
+export = detect;
diff --git a/types/franc/tsconfig.json b/types/franc/tsconfig.json
new file mode 100644
index 0000000000..2fe0151ec5
--- /dev/null
+++ b/types/franc/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "franc-tests.ts"]
+}
diff --git a/types/franc/tslint.json b/types/franc/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/franc/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }
diff --git a/types/freedom/tsconfig.json b/types/freedom/tsconfig.json
index dd0bd2e13c..adada163d4 100644
--- a/types/freedom/tsconfig.json
+++ b/types/freedom/tsconfig.json
@@ -1,24 +1,16 @@
 {
-    "files": [
-        "index.d.ts",
-        "freedom-tests.ts"
-    ],
+    "files": ["index.d.ts", "freedom-tests.ts"],
     "compilerOptions": {
         "module": "commonjs",
-        "lib": [
-            "es6",
-            "dom"
-        ],
+        "lib": ["es6", "dom"],
         "noImplicitAny": true,
         "noImplicitThis": true,
         "strictNullChecks": false,
         "strictFunctionTypes": true,
         "baseUrl": "../",
-        "typeRoots": [
-            "../"
-        ],
+        "typeRoots": ["../"],
         "types": [],
         "noEmit": true,
         "forceConsistentCasingInFileNames": true
     }
-}
\ No newline at end of file
+}