Working with bootstrap-flask

app/__init__.py

@@ -1,5 +1,5 @@
 import os
-from flask import Flask
+from flask import Flask, request
 from config import Config
 import logging
 from logging.handlers import RotatingFileHandler, SMTPHandler
@@ -8,6 +8,7 @@ from flask_migrate import Migrate
 from flask_login import LoginManager
 from flask_bootstrap import Bootstrap
 from flask_moment import Moment
+from flask_babel import Babel, lazy_gettext as _l
 
 app = Flask(__name__)
 app.config.from_object(Config)
@@ -22,6 +23,7 @@ login = LoginManager(app)
 login.login_view = "login"
 bootstrap = Bootstrap(app)
 moment = Moment(app)
+babel = Babel(app)
 
 if not app.debug:
     if app.config["MAIL_SERVER"]:
@@ -57,3 +59,8 @@ if not app.debug:
     app.logger.setLevel(logging.INFO)
     app.logger.info("Microblog startup")
 from app import routes, models, errors
+
+
+@babel.localeselector
+def get_locale():
+    return request.accept_languages.best_match(app.config["LANGUAGES"])

config.py

@@ -16,3 +16,4 @@ class Config(object):
     MAIL_PASSWORD = os.environ.get("MAIL_PASSWORD")
     ADMINS = ["your-email@example.com"]
     POSTS_PER_PAGE = 25
+    LANGUAGES = ["en", "es"]