diff --git a/model/post.go b/model/post.go
index e0c13c9..3a264ce 100644
--- a/model/post.go
+++ b/model/post.go
@@ -19,4 +19,5 @@ type ReplyContext struct {
 	ReplySpoiler    string
 	ReplyContent    string
 	ForceVisibility bool
+	ReplyLanguage   string
 }
diff --git a/service/service.go b/service/service.go
index 8215c6a..463edf7 100644
--- a/service/service.go
+++ b/service/service.go
@@ -362,6 +362,8 @@ func (s *service) ThreadPage(c *client, id string, reply bool) (err error) {
 			visibility = c.s.Settings.DefaultVisibility
 		}
 
+		replyLanguage := status.Language
+
 		pctx = model.PostContext{
 			DefaultVisibility: visibility,
 			DefaultFormat:     c.s.Settings.DefaultFormat,
@@ -372,6 +374,7 @@ func (s *service) ThreadPage(c *client, id string, reply bool) (err error) {
 				ReplySpoiler:    spoilerText,
 				ReplyContent:    content,
 				ForceVisibility: isDirect,
+				ReplyLanguage:   replyLanguage,
 			},
 		}
 	}
diff --git a/templates/postform.tmpl b/templates/postform.tmpl
index 964032b..6b49f6c 100644
--- a/templates/postform.tmpl
+++ b/templates/postform.tmpl
@@ -48,7 +48,7 @@
 	<button type="submit" accesskey="P" title="Post (P)"> Post </button>
 	<button type="reset" title="Reset"> Reset </button>
 	<input id="edit-status-id" name="edit-status-id" placeholder="Input Status ID for edit" title="Edit ID">
-	<input id="lang-code" name="lang-code" placeholder="lang" title="Post language (ISO 639) [en, ru, etc..] Default: none" size="4">
+	<input id="lang-code" name="lang-code" placeholder="lang" title="Post language (ISO 639) [en, ru, etc..] Default: none" size="4" value="{{if .ReplyContext}}{{.ReplyContext.ReplyLanguage}}{{end}}">
 	<input type="number" id="expires-in" name="expires-in" title="Post autodeleted after hour(s)" min="0" value="0" size="4">
 	<input type="datetime-local" id="scheduled" name="scheduled" step=300 title="Schedule your status (timezone UTC+0)">
 </form>