Remove `lang` attribute from individual statuses (#12124)

Fix #10930

app/javascript/mastodon/components/status_content.js

@@ -216,14 +216,14 @@ export default class StatusContent extends React.PureComponent {
       return (
         <div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp}>
           <p style={{ marginBottom: hidden && status.get('mentions').isEmpty() ? '0px' : null }}>
-            <span dangerouslySetInnerHTML={spoilerContent} lang={status.get('language')} />
+            <span dangerouslySetInnerHTML={spoilerContent} />
             {' '}
             <button tabIndex='0' className={`status__content__spoiler-link ${hidden ? 'status__content__spoiler-link--show-more' : 'status__content__spoiler-link--show-less'}`} onClick={this.handleSpoilerClick}>{toggleText}</button>
           </p>
 
           {mentionsPlaceholder}
 
-          <div tabIndex={!hidden ? 0 : null} className={`status__content__text ${!hidden ? 'status__content__text--visible' : ''}`} style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
+          <div tabIndex={!hidden ? 0 : null} className={`status__content__text ${!hidden ? 'status__content__text--visible' : ''}`} style={directionStyle} dangerouslySetInnerHTML={content} />
 
           {!hidden && !!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
         </div>
@@ -231,7 +231,7 @@ export default class StatusContent extends React.PureComponent {
     } else if (this.props.onClick) {
       const output = [
         <div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp} key='status-content'>
-          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
+          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} />
 
           {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
         </div>,
@@ -245,7 +245,7 @@ export default class StatusContent extends React.PureComponent {
     } else {
       return (
         <div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle}>
-          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
+          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} />
 
           {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
         </div>

app/views/statuses/_detailed_status.html.haml

@@ -20,7 +20,7 @@
       %p{ :style => ('margin-bottom: 0' unless current_account&.user&.setting_expand_spoilers) }<
         %span.p-summary> #{Formatter.instance.format_spoiler(status, autoplay: autoplay)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content{ lang: status.language, style: "display: #{!current_account&.user&.setting_expand_spoilers && status.spoiler_text? ? 'none' : 'block'}; direction: #{rtl_status?(status) ? 'rtl' : 'ltr'}" }
+    .e-content{ style: "display: #{!current_account&.user&.setting_expand_spoilers && status.spoiler_text? ? 'none' : 'block'}; direction: #{rtl_status?(status) ? 'rtl' : 'ltr'}" }
       = Formatter.instance.format(status, custom_emojify: true, autoplay: autoplay)
       - if status.preloadable_poll
         = react_component :poll, disabled: true, poll: ActiveModelSerializers::SerializableResource.new(status.preloadable_poll, serializer: REST::PollSerializer, scope: current_user, scope_name: :current_user).as_json do

app/views/statuses/_simple_status.html.haml

@@ -24,7 +24,7 @@
       %p{ :style => ('margin-bottom: 0' unless current_account&.user&.setting_expand_spoilers) }<
         %span.p-summary> #{Formatter.instance.format_spoiler(status, autoplay: autoplay)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content{ lang: status.language, style: "display: #{!current_account&.user&.setting_expand_spoilers && status.spoiler_text? ? 'none' : 'block'}; direction: #{rtl_status?(status) ? 'rtl' : 'ltr'}" }
+    .e-content{ style: "display: #{!current_account&.user&.setting_expand_spoilers && status.spoiler_text? ? 'none' : 'block'}; direction: #{rtl_status?(status) ? 'rtl' : 'ltr'}" }
       = Formatter.instance.format(status, custom_emojify: true, autoplay: autoplay)
       - if status.preloadable_poll
         = react_component :poll, disabled: true, poll: ActiveModelSerializers::SerializableResource.new(status.preloadable_poll, serializer: REST::PollSerializer, scope: current_user, scope_name: :current_user).as_json do