diff --git a/main.py b/main.py
index 0bb2d00..6d2ed42 100644
--- a/main.py
+++ b/main.py
@@ -55,6 +55,9 @@ def process():
         if "unsafe" in request.form:
             args.append("-u")
 
+        if "experimental" in request.form:
+            args.append("-e")
+
         # run subprocess and capture output as UTF-8 so we get a string instead of
         # bytes for ansi2html
         results = subprocess.run(
diff --git a/templates/index.html b/templates/index.html
index a33ea6b..f2f6bd7 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -12,7 +12,7 @@
             <input class="form-control" type="file" id="formFile" name="file" accept=".csv">
           </div>
 
-          <p>Options</p>
+          <p>Basic options:</p>
 
           <div class="mb-3 form-check form-switch">
             <input class="form-check-input" type="checkbox" id="unsafeCheckbox" name="unsafe">
@@ -20,6 +20,14 @@
             <div id="unsafeHelp" class="form-text">This will remove newlines and perform <a href="https://withblue.ink/2019/03/11/why-you-need-to-normalize-unicode-strings.html" title='When "Zoë" !== "Zoë". Or why you need to normalize Unicode strings'>normalization of Unicode characters</a>. Read more about these <a href="https://github.com/ilri/csv-metadata-quality#unsafe-fixes">unsafe fixes</a>.</div>
           </div>
 
+          <p>Experimental options</p>
+
+          <div class="mb-3 form-check form-switch">
+            <input class="form-check-input" type="checkbox" id="experimentalCheckbox" name="experimental">
+            <label class="form-check-label" for="experimentalCheckbox" aria-describedby="experimentalHelp">Enable experimental checks</label>
+            <div id="experimentalHelp" class="form-text">Attempt to validate whether the value of an item's <code>dc.language.iso</code> or <code>dcterms.language</code> field matches the <em>actual</em> language of text used in its title, abstract, and citation. Read more about these <a href="https://github.com/ilri/csv-metadata-quality#experimental-checks">experimental checks</a>.</div>
+          </div>
+
           <button type="submit" class="btn btn-primary">Submit</button>
         </form>
       </div>