I want my Django site to be available in both English and Azerbaijani languages.
This is how I wrote the codes for it. However, I do not know what is true. Is there an alternative? Does this method affect the speed of the site?

in my view :

def change_Lang(request):
    referer = request.META.get('HTTP_REFERER') 
    lang = request.GET.get("pylang", "en")
    pylang = request.session.get("pylang", None) 
    if lang != "az" and lang != "en": lang = "en"
    if pylang == None: request.session["pylang"] = lang 
    if pylang != lang: request.session["pylang"] = lang 
    if referer: return HttpResponseRedirect(referer)
    return redirect("home")

in my templatetag:

@register.simple_tag
def pylang(value, en, az):
    if value == "en": return en
    elif value == "az": return az
    else: return en

in my template :

{% load pylang %}
{% pylang request.session.pylang "About - PyTerminator.com" "Haqqımızda - PyTerminator.com" %} 

I want to know if this method has a negative effect on the speed of the site?
What is the alternative?
Suggest better options. Thanks in advance)