diff --git a/app/javascript/mastodon/components/autosuggest_input.js b/app/javascript/mastodon/components/autosuggest_input.js
index 12d44b5d0..b8f8c6f45 100644
--- a/app/javascript/mastodon/components/autosuggest_input.js
+++ b/app/javascript/mastodon/components/autosuggest_input.js
@@ -50,6 +50,7 @@ export default class AutosuggestInput extends ImmutablePureComponent {
     id: PropTypes.string,
     searchTokens: PropTypes.arrayOf(PropTypes.string),
     maxLength: PropTypes.number,
+    lang: PropTypes.string,
   };
 
   static defaultProps = {
@@ -185,7 +186,7 @@ export default class AutosuggestInput extends ImmutablePureComponent {
   }
 
   render () {
-    const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus, className, id, maxLength } = this.props;
+    const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus, className, id, maxLength, lang } = this.props;
     const { suggestionsHidden } = this.state;
 
     return (
@@ -210,6 +211,7 @@ export default class AutosuggestInput extends ImmutablePureComponent {
             id={id}
             className={className}
             maxLength={maxLength}
+            lang={lang}
           />
         </label>
 
diff --git a/app/javascript/mastodon/components/autosuggest_textarea.js b/app/javascript/mastodon/components/autosuggest_textarea.js
index 08b9cd80b..b6c590916 100644
--- a/app/javascript/mastodon/components/autosuggest_textarea.js
+++ b/app/javascript/mastodon/components/autosuggest_textarea.js
@@ -48,6 +48,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
     onKeyDown: PropTypes.func,
     onPaste: PropTypes.func.isRequired,
     autoFocus: PropTypes.bool,
+    lang: PropTypes.string,
   };
 
   static defaultProps = {
@@ -192,7 +193,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
   }
 
   render () {
-    const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus, children } = this.props;
+    const { value, suggestions, disabled, placeholder, onKeyUp, autoFocus, lang, children } = this.props;
     const { suggestionsHidden } = this.state;
 
     return [
@@ -216,6 +217,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
               onPaste={this.onPaste}
               dir='auto'
               aria-autocomplete='list'
+              lang={lang}
             />
           </label>
         </div>
diff --git a/app/javascript/mastodon/features/compose/components/compose_form.js b/app/javascript/mastodon/features/compose/components/compose_form.js
index fc2eefa45..7154c5efc 100644
--- a/app/javascript/mastodon/features/compose/components/compose_form.js
+++ b/app/javascript/mastodon/features/compose/components/compose_form.js
@@ -64,6 +64,7 @@ class ComposeForm extends ImmutablePureComponent {
     anyMedia: PropTypes.bool,
     isInReply: PropTypes.bool,
     singleColumn: PropTypes.bool,
+    lang: PropTypes.string,
   };
 
   static defaultProps = {
@@ -240,6 +241,7 @@ class ComposeForm extends ImmutablePureComponent {
             searchTokens={[':']}
             id='cw-spoiler-input'
             className='spoiler-input__input'
+            lang={this.props.lang}
           />
         </div>
 
@@ -257,6 +259,7 @@ class ComposeForm extends ImmutablePureComponent {
           onSuggestionSelected={this.onSuggestionSelected}
           onPaste={onPaste}
           autoFocus={autoFocus}
+          lang={this.props.lang}
         >
           <EmojiPickerDropdown onPickEmoji={this.handleEmojiPick} />
 
diff --git a/app/javascript/mastodon/features/compose/containers/compose_form_container.js b/app/javascript/mastodon/features/compose/containers/compose_form_container.js
index 14cf9230b..2b7642237 100644
--- a/app/javascript/mastodon/features/compose/containers/compose_form_container.js
+++ b/app/javascript/mastodon/features/compose/containers/compose_form_container.js
@@ -26,6 +26,7 @@ const mapStateToProps = state => ({
   isUploading: state.getIn(['compose', 'is_uploading']),
   anyMedia: state.getIn(['compose', 'media_attachments']).size > 0,
   isInReply: state.getIn(['compose', 'in_reply_to']) !== null,
+  lang: state.getIn(['compose', 'language']),
 });
 
 const mapDispatchToProps = (dispatch) => ({