Change language Flask Babel manually
A good way to do this is shown in the docs of Flask-Admin
@babel.localeselectordef get_locale(): if request.args.get('lang'): session['lang'] = request.args.get('lang') return session.get('lang', 'en')Now, you could try a French version of the application at: http://localhost:5000/admin/?lang=fr.
You can still specify the default language via BABEL_DEFAULT_LOCALE.