diff --git a/locales/en-US.yml b/locales/en-US.yml
index 33a5603df9..8029b57f91 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -1561,7 +1561,7 @@ admin/views/emoji.vue:
   add-emoji:
     title: "Add emoji"
     name: "Emoji name"
-    name-desc: "You can use the characters a~z 0~9 _"
+    name-desc: "Able to use: a - z, A - Z, 0 - 9, +, -, _"
     category: "Categories"
     aliases: "Aliases"
     aliases-desc: "You can add more than one, separated by spaces."
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 0d189a3f8c..d6fe8c1569 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1703,7 +1703,7 @@ admin/views/emoji.vue:
   add-emoji:
     title: "絵文字の登録"
     name: "絵文字名"
-    name-desc: "a - z, 0 - 9, _ の文字が使えます。"
+    name-desc: "文字: a - z, A - Z, 0 - 9, +, -, _"
     category: "カテゴリ"
     aliases: "エイリアス"
     aliases-desc: "スペースで区切って複数設定できます。"