diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index fedd2be..dd0f06e 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -17,6 +17,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install pylint
         pip install -r requirements.txt
     - name: Analysing the code with pylint
       run: |
diff --git a/app.py b/app.py
index b9b9c4f..a163ef6 100644
--- a/app.py
+++ b/app.py
@@ -7,12 +7,15 @@
 from flask import Flask, render_template, request, send_from_directory
 from flask_wtf import FlaskForm
 from wtforms import StringField, SubmitField
+from flask_babel import Babel, gettext
 
 from base import data, is_valid_key, get_translation
 
 flask_app = Flask(__name__)
 flask_app.config["SECRET_KEY"] = getenv("SECRET_KEY", "dev")
 
+babel = Babel(flask_app)
+
 page_lang = {
     "zh_cn": {
         "lang_name": "简体中文（中国大陆）",
@@ -32,8 +35,8 @@
 class QueryForm(FlaskForm):
     """查询表单"""
 
-    source_string = StringField("查询的源字符串内容：")
-    submit = SubmitField("查询")
+    source_string = StringField(gettext("query_input_label"))
+    submit = SubmitField(gettext("query_button"))
 
 
 @flask_app.route("/", methods=["GET", "POST"])
diff --git a/static/style.css b/static/style.css
index 43c8af0..04309e9 100644
--- a/static/style.css
+++ b/static/style.css
@@ -103,6 +103,27 @@ body {
     height: auto;
 }
 
+/* 语言选单样式 */
+
+.page-lang-selector {
+    position: fixed;
+    top: 10px;
+    left: 10px;
+    display: flex;
+    align-items: center;
+}
+
+.page-lang-selector label{
+    text-align: right;
+}
+
+.page-lang-selector select {
+    padding-top: .25em;
+    padding-bottom: .25em;
+    border: 1px solid #ccc;
+    border-radius: 5px;
+}
+
 /* 标题样式 */
 .title {
     font-family: 'Noto Serif CJK SC SemiBold', 'Source Han Serif SC SemiBold', '思源宋体 SemiBold', SimSun, 'Times New Roman', Times, serif;