diff --git a/config/locales/en.yml b/config/locales/en.yml
index 89fd151c4..a61503888 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -233,6 +233,16 @@ en:
   error_can_not_delete_auth_source: "This authentication mode is in use and cannot be deleted."
   error_spent_on_future_date: "Cannot log time on a future date"
   error_not_allowed_to_log_time_for_other_users: "You are not allowed to log time for other users"
+  error_can_not_execute_macro_html: "Error executing the <strong>%{name}</strong> macro (%{error})"
+  error_macro_does_not_accept_block: "This macro does not accept a block of text"
+  error_invalid_macro_name: "Invalid macro name: %{name} (only 0-9, A-Z, a-z and _ characters are accepted)"
+  error_can_not_create_macro_without_block: "Can not create a macro without a block!"
+  error_childpages_macro_no_argument: "With no argument, this macro can be called from wiki pages only"
+  error_circular_inclusion: "Circular inclusion detected"
+  error_page_not_found: "Page not found"
+  error_filename_required: "Filename required"
+  error_invalid_size_parameter: "Invalid size parameter"
+  error_attachment_not_found: "Attachment %{name} not found"
 
   mail_subject_lost_password: "Your %{value} password"
   mail_body_lost_password: 'To change your password, click on the following link:'
diff --git a/lib/redmine/wiki_formatting/macros.rb b/lib/redmine/wiki_formatting/macros.rb
index c34e404e2..03eeecde9 100644
--- a/lib/redmine/wiki_formatting/macros.rb
+++ b/lib/redmine/wiki_formatting/macros.rb
@@ -45,12 +45,12 @@ module Redmine
             if self.class.instance_method(method_name).arity == 3
               send(method_name, obj, args, text)
             elsif text
-              raise "This macro does not accept a block of text"
+              raise t(:error_macro_does_not_accept_block)
             else
               send(method_name, obj, args)
             end
           rescue => e
-            "<div class=\"flash error\">Error executing the <strong>#{h name}</strong> macro (#{h e.to_s})</div>".html_safe
+            %|<div class="flash error">#{t(:error_can_not_execute_macro_html, :name => name, :error => e.to_s)}</div>|.html_safe
           end
         end
 
@@ -152,10 +152,10 @@ module Redmine
         def macro(name, options={}, &block)
           options.assert_valid_keys(:desc, :parse_args)
           unless /\A\w+\z/.match?(name.to_s)
-            raise "Invalid macro name: #{name} (only 0-9, A-Z, a-z and _ characters are accepted)"
+            raise t(:error_invalid_macro_name, :name => name)
           end
           unless block_given?
-            raise "Can not create a macro without a block!"
+            raise t(:error_can_not_create_macro_without_block)
           end
           name = name.to_s.downcase.to_sym
           available_macros[name] = {:desc => @@desc || ''}.merge(options)
@@ -204,9 +204,9 @@ module Redmine
         elsif obj.is_a?(WikiContent) || obj.is_a?(WikiContent::Version)
           page = obj.page
         else
-          raise 'With no argument, this macro can be called from wiki pages only.'
+          raise t(:error_childpages_macro_no_argument)
         end
-        raise 'Page not found' if page.nil? || !User.current.allowed_to?(:view_wiki_pages, page.wiki.project)
+        raise t(:error_page_not_found) if page.nil? || !User.current.allowed_to?(:view_wiki_pages, page.wiki.project)
         pages = page.self_and_descendants(options[:depth]).group_by(&:parent_id)
         render_page_hierarchy(pages, options[:parent] ? page.parent_id : page.id)
       end
@@ -216,9 +216,9 @@ module Redmine
              "{{include(projectname:Foo)}} -- to include a page of a specific project wiki"
       macro :include do |obj, args|
         page = Wiki.find_page(args.first.to_s, :project => @project)
-        raise 'Page not found' if page.nil? || !User.current.allowed_to?(:view_wiki_pages, page.wiki.project)
+        raise t(:error_page_not_found) if page.nil? || !User.current.allowed_to?(:view_wiki_pages, page.wiki.project)
         @included_wiki_pages ||= []
-        raise 'Circular inclusion detected' if @included_wiki_pages.include?(page.id)
+        raise t(:error_circular_inclusion) if @included_wiki_pages.include?(page.id)
         @included_wiki_pages << page.id
         out = textilizable(page.content, :text, :attachments => page.attachments, :headings => false,  :inline_attachments => @@inline_attachments)
         @included_wiki_pages.pop
@@ -247,9 +247,9 @@ module Redmine
       macro :thumbnail do |obj, args|
         args, options = extract_macro_options(args, :size, :title)
         filename = args.first
-        raise 'Filename required' unless filename.present?
+        raise t(:error_filename_required) unless filename.present?
         size = options[:size]
-        raise 'Invalid size parameter' unless size.nil? || /^\d+$/.match?(size)
+        raise t(:error_invalid_size_parameter) unless size.nil? || /^\d+$/.match?(size)
         size = size.to_i
         size = 200 unless size > 0
         if obj && obj.respond_to?(:attachments) && attachment = Attachment.latest_attach(obj.attachments, filename)
@@ -260,7 +260,7 @@ module Redmine
           img = image_tag(thumbnail_url, :alt => attachment.filename)
           link_to(img, image_url, :class => 'thumbnail', :title => title)
         else
-          raise "Attachment #{filename} not found"
+          raise t(:error_attachment_not_found, :name => filename)
         end
       end