diff --git a/app/views/hooks/_view_issues_show_description_bottom.html.erb b/app/views/hooks/_view_issues_show_description_bottom.html.erb
index 246cda1..42c289c 100644
--- a/app/views/hooks/_view_issues_show_description_bottom.html.erb
+++ b/app/views/hooks/_view_issues_show_description_bottom.html.erb
@@ -9,11 +9,11 @@ a.toggle-quoted-text {
 }
 
 a.quoted-text-collapsed {
-  background-image: url(/images/arrow_collapsed.png);
+  background-image: url(<%= image_path('arrow_collapsed.png') %>);
 }
 
 a.quoted-text-expanded {
-  background-image: url(/images/arrow_expanded.png);
+  background-image: url(<%= image_path('arrow_expanded.png') %>);
 }
 </style>
 
diff --git a/config/locales/ja.yml b/config/locales/ja.yml
new file mode 100644
index 0000000..583f67b
--- /dev/null
+++ b/config/locales/ja.yml
@@ -0,0 +1,3 @@
+ja:
+  label_show_quoted_text: "引用文を表示する"
+  label_hide_quoted_text: "引用文を隠す"