Update en.json

locales/en.json

@@ -51,8 +51,8 @@
 			},
 			"mk-post-form": {
 				"post-placeholder": "What's happening?",
-				"reply-placeholder": "この投稿への返信...",
-				"quote-placeholder": "この投稿を引用...",
+				"reply-placeholder": "Reply to this post...",
+				"quote-placeholder": "Quote this post...",
 				"post": "Post",
 				"reply": "Reply",
 				"repost": "Repost",