diff --git a/layouts/shortcodes/marginnote.html b/layouts/shortcodes/marginnote.html
index 71b3c64..61dcebf 100644
--- a/layouts/shortcodes/marginnote.html
+++ b/layouts/shortcodes/marginnote.html
@@ -7,6 +7,6 @@
 {{- $ind := .Get "ind" | default .Site.Params.marginNoteInd -}}
 <label for="marginnote-{{ $label }}" class="margin-toggle marginnote-ind">{{ $ind }}</label>
 <input type="checkbox" id="marginnote-{{ $label }}" class="margin-toggle"/>
-<span class="marginnote">
+<span class="marginnote"{{ with .Get "lang" }} lang="{{ . }}"{{ end }}>
 {{ .Inner | markdownify}}
 </span>
diff --git a/layouts/shortcodes/sidenote.html b/layouts/shortcodes/sidenote.html
index c74d462..786d20d 100644
--- a/layouts/shortcodes/sidenote.html
+++ b/layouts/shortcodes/sidenote.html
@@ -6,6 +6,6 @@
 {{- $label := $.Page.Scratch.Get "sidenoteCounter" -}}
 <label for="sidenote-{{ $label }}" class="margin-toggle sidenote-number">({{ $label }})</label>
 <input type="checkbox" id="sidenote-{{ $label }}" class="margin-toggle"/>
-<span class="sidenote">
+<span class="sidenote"{{ with .Get "lang" }} lang="{{ . }}"{{ end }}>
 <span class="sidenote-number">({{ $label }})</span>{{ .Inner | markdownify }}
 </span>