diff --git a/app/assets/stylesheets/admin_rtl.scss b/app/assets/stylesheets/admin_rtl.scss
new file mode 100644
index 00000000000..1c1bb0974c0
--- /dev/null
+++ b/app/assets/stylesheets/admin_rtl.scss
@@ -0,0 +1 @@
+@import "admin";
diff --git a/app/assets/stylesheets/common/base/rtl.scss b/app/assets/stylesheets/common/base/rtl.scss
index fcfa7f904af..6959a71547e 100644
--- a/app/assets/stylesheets/common/base/rtl.scss
+++ b/app/assets/stylesheets/common/base/rtl.scss
@@ -24,15 +24,6 @@
   }
 }
 
-.rtl .admin-customize .current-style .toggle-mobile {
-  position: static !important;
-  float: left !important;
-}
-.rtl .admin-customize .current-style .toggle-maximize {
-  position: static !important;
-  float: left !important;
-}
-
 // For the support_mixed_text_direction setting
 html:not(.rtl) .cooked ul[dir="rtl"],
 html:not(.rtl) .d-editor-preview ul[dir="rtl"],
@@ -43,36 +34,6 @@ html:not(.rtl) .d-editor-preview ul[dir="rtl"],
   margin-right: 1.25em;
 }
 
-.rtl {
-  $mobile-breakpoint: 700px;
-
-  .admin-detail.mobile-open {
-    @media (max-width: $mobile-breakpoint) {
-      transition: transform 0.3s ease;
-      @include transform(translateX(-250px));
-    }
-    @media (max-width: 500px) {
-      transition: transform 0.3s ease;
-      @include transform(translateX(-50%));
-    }
-  }
-
-  .admin-detail.mobile-closed {
-    @media (max-width: $mobile-breakpoint) {
-      transition: transform 0.3s ease;
-      @include transform(translateX(0));
-      margin-left: -10px !important;
-      padding-left: 10px !important;
-    }
-  }
-
-  .admin-nav {
-    .nav-stacked {
-      margin: 0 -10px 0 10px !important;
-    }
-  }
-}
-
 .rtl .ace_placeholder {
   direction: rtl !important;
   text-align: right !important;
diff --git a/app/assets/stylesheets/wizard_rtl.scss b/app/assets/stylesheets/wizard_rtl.scss
new file mode 100644
index 00000000000..f4274872a20
--- /dev/null
+++ b/app/assets/stylesheets/wizard_rtl.scss
@@ -0,0 +1 @@
+@import "wizard";
diff --git a/app/controllers/bootstrap_controller.rb b/app/controllers/bootstrap_controller.rb
index 48a31a6e16c..575dd25f78d 100644
--- a/app/controllers/bootstrap_controller.rb
+++ b/app/controllers/bootstrap_controller.rb
@@ -26,8 +26,8 @@ class BootstrapController < ApplicationController
     else
       add_style(mobile_view? ? :mobile : :desktop)
     end
-    add_style(:admin) if staff?
-    add_style(:wizard) if admin?
+    add_style(rtl? ? :admin_rtl : :admin) if staff?
+    add_style(rtl? ? :wizard_rtl : :wizard) if admin?
 
     assets_fake_request = ActionDispatch::Request.new(request.env.dup)
     assets_for_url = params[:for_url]
@@ -44,6 +44,7 @@ class BootstrapController < ApplicationController
         mobile_view: mobile_view?,
         desktop_view: !mobile_view?,
         request: assets_fake_request,
+        rtl: rtl?,
       )
       .each { |file| add_style(file, plugin: true) }
     add_style(mobile_view? ? :mobile_theme : :desktop_theme) if theme_id.present?
diff --git a/app/views/common/_discourse_preload_stylesheet.html.erb b/app/views/common/_discourse_preload_stylesheet.html.erb
index 06402715769..efe1ac15d44 100644
--- a/app/views/common/_discourse_preload_stylesheet.html.erb
+++ b/app/views/common/_discourse_preload_stylesheet.html.erb
@@ -7,14 +7,22 @@
 <%- end %>
 
 <%- if staff? %>
-  <%= discourse_stylesheet_preload_tag(:admin) %>
+  <%- if rtl? %>
+    <%= discourse_stylesheet_preload_tag(:admin_rtl) %>
+  <%- else %>
+    <%= discourse_stylesheet_preload_tag(:admin) %>
+  <%- end %>
 <%- end %>
 
 <%- if admin? %>
-  <%= discourse_stylesheet_preload_tag(:wizard) %>
+  <%- if rtl? %>
+    <%= discourse_stylesheet_preload_tag(:wizard_rtl) %>
+  <%- else %>
+    <%= discourse_stylesheet_preload_tag(:wizard) %>
+  <%- end %>
 <%- end %>
 
-<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request).each do |file| %>
+<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request, rtl: rtl?).each do |file| %>
   <%= discourse_stylesheet_preload_tag(file) %>
 <%- end %>
 
diff --git a/app/views/common/_discourse_publish_stylesheet.html.erb b/app/views/common/_discourse_publish_stylesheet.html.erb
index 9429b0cd8dd..5a7b6a9bb72 100644
--- a/app/views/common/_discourse_publish_stylesheet.html.erb
+++ b/app/views/common/_discourse_publish_stylesheet.html.erb
@@ -1,6 +1,6 @@
 <%= discourse_stylesheet_link_tag 'publish', theme_id: nil %>
 
-<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request).each do |file| %>
+<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request, rtl: rtl?).each do |file| %>
   <%= discourse_stylesheet_link_tag(file) %>
 <%- end %>
 
diff --git a/app/views/common/_discourse_stylesheet.html.erb b/app/views/common/_discourse_stylesheet.html.erb
index ca92af30768..68dd71ab7bb 100644
--- a/app/views/common/_discourse_stylesheet.html.erb
+++ b/app/views/common/_discourse_stylesheet.html.erb
@@ -7,14 +7,22 @@
 <%- end %>
 
 <%- if staff? %>
-  <%= discourse_stylesheet_link_tag(:admin) %>
+  <%- if rtl? %>
+    <%= discourse_stylesheet_link_tag(:admin_rtl) %>
+  <%- else %>
+    <%= discourse_stylesheet_link_tag(:admin) %>
+  <%- end %>
 <%- end %>
 
 <%- if admin? %>
-  <%= discourse_stylesheet_link_tag(:wizard) %>
+  <%- if rtl? %>
+    <%= discourse_stylesheet_link_tag(:wizard_rtl) %>
+  <%- else %>
+    <%= discourse_stylesheet_link_tag(:wizard) %>
+  <%- end %>
 <%- end %>
 
-<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request).each do |file| %>
+<%- Discourse.find_plugin_css_assets(include_official: allow_plugins?, include_unofficial: allow_third_party_plugins?, mobile_view: mobile_view?, desktop_view: !mobile_view?, request: request, rtl: rtl?).each do |file| %>
   <%= discourse_stylesheet_link_tag(file) %>
 <%- end %>
 
diff --git a/lib/discourse.rb b/lib/discourse.rb
index 97c1954e1b8..bbb568246fa 100644
--- a/lib/discourse.rb
+++ b/lib/discourse.rb
@@ -431,6 +431,7 @@ module Discourse
           end
     end
 
+    assets.map! { |asset| "#{asset}_rtl" } if args[:rtl]
     assets
   end
 
diff --git a/lib/stylesheet/manager.rb b/lib/stylesheet/manager.rb
index a9d636b6c3b..7f71831ba87 100644
--- a/lib/stylesheet/manager.rb
+++ b/lib/stylesheet/manager.rb
@@ -43,13 +43,21 @@ class Stylesheet::Manager
   end
 
   def self.precompile_css
-    targets = %i[desktop mobile desktop_rtl mobile_rtl admin wizard]
+    targets = %i[desktop mobile admin wizard desktop_rtl mobile_rtl admin_rtl wizard_rtl]
+
     targets +=
       Discourse.find_plugin_css_assets(
         include_disabled: true,
         mobile_view: true,
         desktop_view: true,
       )
+    targets +=
+      Discourse.find_plugin_css_assets(
+        include_disabled: true,
+        mobile_view: true,
+        desktop_view: true,
+        rtl: true,
+      )
 
     targets.each do |target|
       $stderr.puts "precompile target: #{target}"
diff --git a/lib/stylesheet/manager/builder.rb b/lib/stylesheet/manager/builder.rb
index 47a846e1403..5f4fbabbaa0 100644
--- a/lib/stylesheet/manager/builder.rb
+++ b/lib/stylesheet/manager/builder.rb
@@ -35,11 +35,11 @@ class Stylesheet::Manager::Builder
       end
     end
 
-    rtl = @target.to_s =~ /_rtl\z/
+    rtl = @target.to_s.end_with?("_rtl")
     css, source_map =
       with_load_paths do |load_paths|
         Stylesheet::Compiler.compile_asset(
-          @target,
+          @target.to_s.gsub(/_rtl\z/, "").to_sym,
           rtl: rtl,
           theme_id: theme&.id,
           theme_variables: theme&.scss_variables.to_s,
diff --git a/spec/fixtures/plugins/scss_plugin/assets/stylesheets/common/common.scss b/spec/fixtures/plugins/scss_plugin/assets/stylesheets/common/common.scss
index 0ff1ecfff14..bcf35618fbb 100644
--- a/spec/fixtures/plugins/scss_plugin/assets/stylesheets/common/common.scss
+++ b/spec/fixtures/plugins/scss_plugin/assets/stylesheets/common/common.scss
@@ -8,6 +8,8 @@ body {
   line-height: $lineheight;
 }
 
+.pull-left { float: left; }
+
 footer {
   border-color: $footer1;
 }
diff --git a/spec/lib/stylesheet/compiler_spec.rb b/spec/lib/stylesheet/compiler_spec.rb
index 3334879d3ee..753c54a3104 100644
--- a/spec/lib/stylesheet/compiler_spec.rb
+++ b/spec/lib/stylesheet/compiler_spec.rb
@@ -89,6 +89,20 @@ RSpec.describe Stylesheet::Compiler do
         expect(css).to include("background:")
       end
 
+      context "with the `rtl` option" do
+        it "generates an RTL version of the plugin CSS if the option is true" do
+          css, _ = Stylesheet::Compiler.compile_asset("scss_plugin", theme_id: theme.id, rtl: true)
+          expect(css).to include(".pull-left{float:right}")
+          expect(css).not_to include(".pull-left{float:left}")
+        end
+
+        it "returns an unchanged version of the plugin CSS" do
+          css, _ = Stylesheet::Compiler.compile_asset("scss_plugin", theme_id: theme.id, rtl: false)
+          expect(css).to include(".pull-left{float:left}")
+          expect(css).not_to include(".pull-left{float:right}")
+        end
+      end
+
       it "supports SCSS imports" do
         css, _map = Stylesheet::Compiler.compile_asset("scss_plugin", theme_id: theme.id)
 
diff --git a/spec/lib/stylesheet/manager_spec.rb b/spec/lib/stylesheet/manager_spec.rb
index 5c00f4e6742..433f99decbe 100644
--- a/spec/lib/stylesheet/manager_spec.rb
+++ b/spec/lib/stylesheet/manager_spec.rb
@@ -877,7 +877,11 @@ RSpec.describe Stylesheet::Manager do
     end
   end
 
-  describe ".precompile css" do
+  describe ".precompile_css" do
+    let(:core_targets) do
+      %w[desktop mobile admin wizard desktop_rtl mobile_rtl admin_rtl wizard_rtl]
+    end
+
     before { STDERR.stubs(:write) }
 
     after do
@@ -888,7 +892,6 @@ RSpec.describe Stylesheet::Manager do
     it "correctly generates precompiled CSS" do
       scheme1 = ColorScheme.create!(name: "scheme1")
       scheme2 = ColorScheme.create!(name: "scheme2")
-      core_targets = %i[desktop mobile desktop_rtl mobile_rtl admin wizard]
       theme_targets = %i[desktop_theme mobile_theme]
 
       Theme.update_all(user_selectable: false)
@@ -922,7 +925,7 @@ RSpec.describe Stylesheet::Manager do
       output = capture_output(:stderr) { Stylesheet::Manager.precompile_css }
 
       results = StylesheetCache.pluck(:target)
-      expect(results.size).to eq(core_targets.size)
+      expect(results).to contain_exactly(*core_targets)
 
       StylesheetCache.destroy_all
 
@@ -937,7 +940,7 @@ RSpec.describe Stylesheet::Manager do
       # themes + core
       Stylesheet::Manager.precompile_css
       results = StylesheetCache.pluck(:target)
-      expect(results.size).to eq(28) # 9 core targets + 9 theme + 10 color schemes
+      expect(results.size).to eq(30) # 11 core targets + 9 theme + 10 color schemes
 
       theme_targets.each do |tar|
         expect(
@@ -952,7 +955,7 @@ RSpec.describe Stylesheet::Manager do
       Stylesheet::Manager.precompile_css
       Stylesheet::Manager.precompile_theme_css
       results = StylesheetCache.pluck(:target)
-      expect(results.size).to eq(28) # 9 core targets + 9 theme + 10 color schemes
+      expect(results.size).to eq(30) # 11 core targets + 9 theme + 10 color schemes
 
       expect(results).to include("color_definitions_#{scheme1.name}_#{scheme1.id}_#{user_theme.id}")
       expect(results).to include(
@@ -969,7 +972,6 @@ RSpec.describe Stylesheet::Manager do
       upload = UploadCreator.new(image, "logo.png").create_for(-1)
 
       scheme = ColorScheme.create!(name: "scheme")
-      core_targets = %i[desktop mobile desktop_rtl mobile_rtl admin wizard]
       theme_targets = %i[desktop_theme mobile_theme]
 
       default_theme =
@@ -1009,6 +1011,71 @@ RSpec.describe Stylesheet::Manager do
       css = File.read(theme_builder.stylesheet_fullpath)
       expect(css).to include("border:3px solid green}")
     end
+
+    context "when there are enabled plugins" do
+      let(:plugin1) do
+        plugin1 = Plugin::Instance.new
+        plugin1.path = "#{Rails.root}/spec/fixtures/plugins/my_plugin/plugin.rb"
+        plugin1.register_css "body { padding: 1px 2px 3px 4px; }"
+        plugin1
+      end
+
+      let(:plugin2) do
+        plugin2 = Plugin::Instance.new
+        plugin2.path = "#{Rails.root}/spec/fixtures/plugins/scss_plugin/plugin.rb"
+        plugin2
+      end
+
+      before do
+        Discourse.plugins << plugin1
+        Discourse.plugins << plugin2
+        plugin1.activate!
+        plugin2.activate!
+        Stylesheet::Importer.register_imports!
+        StylesheetCache.destroy_all
+      end
+
+      after do
+        Discourse.plugins.delete(plugin1)
+        Discourse.plugins.delete(plugin2)
+        Stylesheet::Importer.register_imports!
+        DiscoursePluginRegistry.reset!
+      end
+
+      it "generates LTR and RTL CSS for plugins" do
+        output = capture_output(:stderr) { Stylesheet::Manager.precompile_css }
+
+        results = StylesheetCache.pluck(:target)
+        expect(results).to contain_exactly(
+          *core_targets,
+          "my_plugin",
+          "my_plugin_rtl",
+          "scss_plugin",
+          "scss_plugin_rtl",
+        )
+
+        expect(output.scan(/my_plugin$/).length).to eq(1)
+        expect(output.scan(/my_plugin_rtl$/).length).to eq(1)
+        expect(output.scan(/scss_plugin$/).length).to eq(1)
+        expect(output.scan(/scss_plugin_rtl$/).length).to eq(1)
+
+        plugin1_ltr_css = StylesheetCache.where(target: "my_plugin").pluck(:content).first
+        plugin1_rtl_css = StylesheetCache.where(target: "my_plugin_rtl").pluck(:content).first
+
+        expect(plugin1_ltr_css).to include("body{padding:1px 2px 3px 4px}")
+        expect(plugin1_ltr_css).not_to include("body{padding:1px 4px 3px 2px}")
+        expect(plugin1_rtl_css).to include("body{padding:1px 4px 3px 2px}")
+        expect(plugin1_rtl_css).not_to include("body{padding:1px 2px 3px 4px}")
+
+        plugin2_ltr_css = StylesheetCache.where(target: "scss_plugin").pluck(:content).first
+        plugin2_rtl_css = StylesheetCache.where(target: "scss_plugin_rtl").pluck(:content).first
+
+        expect(plugin2_ltr_css).to include(".pull-left{float:left}")
+        expect(plugin2_ltr_css).not_to include(".pull-left{float:right}")
+        expect(plugin2_rtl_css).to include(".pull-left{float:right}")
+        expect(plugin2_rtl_css).not_to include(".pull-left{float:left}")
+      end
+    end
   end
 
   describe ".fs_asset_cachebuster" do
diff --git a/spec/requests/embed_controller_spec.rb b/spec/requests/embed_controller_spec.rb
index 0b00ab6e633..d430bdd657d 100644
--- a/spec/requests/embed_controller_spec.rb
+++ b/spec/requests/embed_controller_spec.rb
@@ -211,7 +211,7 @@ RSpec.describe EmbedController do
         )
 
         topic_embed = Fabricate(:topic_embed, embed_url: embed_url)
-        post = Fabricate(:post, topic: topic_embed.topic)
+        Fabricate(:post, topic: topic_embed.topic)
 
         get "/embed/comments", params: { embed_url: embed_url }, headers: { "REFERER" => embed_url }
 
diff --git a/spec/requests/stylesheets_controller_spec.rb b/spec/requests/stylesheets_controller_spec.rb
index 4622d5e163b..38a03e4706d 100644
--- a/spec/requests/stylesheets_controller_spec.rb
+++ b/spec/requests/stylesheets_controller_spec.rb
@@ -60,6 +60,63 @@ RSpec.describe StylesheetsController do
     expect(response.status).to eq(200)
   end
 
+  context "when there are enabled plugins" do
+    fab!(:user) { Fabricate(:user) }
+
+    let(:plugin) do
+      plugin = Plugin::Instance.new
+      plugin.path = "#{Rails.root}/spec/fixtures/plugins/my_plugin/plugin.rb"
+      plugin.register_css "body { padding: 1px 2px 3px 4px; }"
+      plugin
+    end
+
+    before do
+      Discourse.plugins << plugin
+      plugin.activate!
+      Stylesheet::Importer.register_imports!
+      StylesheetCache.destroy_all
+      SiteSetting.has_login_hint = false
+      SiteSetting.allow_user_locale = true
+      sign_in(user)
+    end
+
+    after do
+      Discourse.plugins.delete(plugin)
+      Stylesheet::Importer.register_imports!
+      DiscoursePluginRegistry.reset!
+    end
+
+    it "can lookup plugin specific css" do
+      get "/"
+
+      html = Nokogiri::HTML5.fragment(response.body)
+      expect(html.at("link[data-target=my_plugin_rtl]")).to eq(nil)
+
+      href = html.at("link[data-target=my_plugin]").attribute("href").value
+      get href
+
+      expect(response.status).to eq(200)
+      expect(response.headers["Content-Type"]).to eq("text/css")
+      expect(response.body).to include("body{padding:1px 2px 3px 4px}")
+      expect(response.body).not_to include("body{padding:1px 4px 3px 2px}")
+
+      user.locale = "ar" # RTL locale
+      user.save!
+      get "/"
+
+      html = Nokogiri::HTML5.fragment(response.body)
+      expect(html.at("link[data-target=my_plugin]")).to eq(nil)
+
+      href = html.at("link[data-target=my_plugin_rtl]").attribute("href").value
+      get href
+
+      expect(response.status).to eq(200)
+      expect(response.headers["Content-Type"]).to eq("text/css")
+      expect(response.body).to include("body{padding:1px 4px 3px 2px}")
+      expect(response.body).not_to include("body{padding:1px 2px 3px 4px}")
+    end
+  end
+
   it "ignores Accept header and does not include Vary header" do
     StylesheetCache.destroy_all
     manager = Stylesheet::Manager.new(theme_id: nil)