lingua.com

Readiness by lane

Green: lingua.com. Thin bar: Education & Online Learning peer median.

Priority fixes for lingua.com

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Harden

   DMARC policy enforces quarantine or reject

   Observed: No DMARC record was found at _dmarc.lingua.com.

   Why it matters: An enforcing DMARC policy helps receiving mail systems reject email that falsely claims to come from your domain, a common route for phishing your customers.

   What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.

   36% of Education & Online Learning peers do this. Limit: Read from public DNS at the time of the check; records may have changed since.

   Guide: A Practical Website Health Check for Owners

2. Priority 2 · Accelerate

   Modern image formats in use

   Observed: The homepage had 5 images and none used WebP or AVIF.

   What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.

   32% of Education & Online Learning peers do this.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

3. Priority 3 · Enable

   Social preview image set

   Observed: The homepage had no og:image, so shared links may show without a preview image.

   What to do: Add Open Graph tags, including og:image with a 1200 x 630 image.

   52% of Education & Online Learning peers do this.

   Guide: SEO Checklist for a New Website

4. Priority 4 · Accelerate

   HTTP/3 advertised

   Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.

   What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.

   25% of Education & Online Learning peers do this.

   Guide: CDN Guide for Website Owners

What lingua.com already does well

Practices fewer than half of Education & Online Learning peers use.

• HSTS kept for at least a yearHSTS with a 365-day max-age.34% of peers
• No render-blocking scripts in <head>Head scripts load without blocking.42% of peers
• Static files cached for 30 days or moreLong-lived caching on static files.45% of peers

What we saw

Homepage checked

https://lingua.com/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Let's Encrypt, 89-day validity, expiring 2027-01-03

DNS operators

1 self-run or other nameserver domain

HSTS

max-age 365 days

Homepage HTML

24 KB, gzip

Images on homepage

5 (jpg 3, png 1, gif 1)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Education & Online Learning sites

• educamaisbrasil.com.br70
• educaplay.com70
• gdzonline.net70
• purposegames.com70
• readworks.org70

Education & Online Learning readiness benchmark