Last updated: March 2026
1. Introduction
Detroit Technical English (Inh. David Willenberg), Hopfenstraße
28, 20359 Hamburg, Germany (“we”, “us”, “our”) is committed to
protecting your personal data. This Privacy Policy explains what
data we collect, how we use it, and your rights under the General
Data Protection Regulation (GDPR).
2. Controller
Detroit Technical English
Inh. David Willenberg
Hopfenstraße 28
20359 Hamburg
Germany
Email: [email protected]
Phone: +49 40 361 95-529
3. Hosting & Infrastructure
Cloudflare
Our website is served through Cloudflare, Inc. (101 Townsend St,
San Francisco, CA 94107, USA). Cloudflare acts as a reverse proxy
and content delivery network (CDN), meaning all traffic to this
website passes through Cloudflare’s infrastructure. Cloudflare may
process connection data including IP addresses for the purposes of
DDoS protection, performance optimisation, and security. Data may
be transferred to servers outside the EU. Cloudflare participates
in the EU-U.S. Data Privacy Framework.
For more information, see Cloudflare’s privacy policy:
https://www.cloudflare.com/privacypolicy/
Legal basis: Art. 6(1)(f) GDPR — legitimate interest in operating a secure
and performant website.
4. Content Delivery Network — jsDelivr
This website loads certain scripts via jsDelivr (Prospect One,
Królewska 65A/1, 30-081 Kraków, Poland). When your browser loads
these resources, your IP address and browser information are
transmitted to jsDelivr’s servers. jsDelivr participates in the
EU-U.S. Data Privacy Framework.
For more information, see jsDelivr’s privacy policy:
https://www.jsdelivr.com/terms/privacy-policy-jsdelivr-net
Legal basis: Art. 6(1)(f) GDPR — legitimate interest in website performance
and functionality.
5. Web Analytics — Umami
With your consent, this website uses Umami, a privacy-focused,
open-source analytics tool. Our instance is self-hosted on our own
infrastructure, meaning no data is shared with third-party
analytics providers. Umami collects anonymised usage data
including page views, referrer information, browser type, and
device type. No cookies are set by Umami and no personally
identifiable information is collected or stored.
Retention: Analytics data is retained for 30
days.
Legal basis: Art. 6(1)(a) GDPR — your consent, given via the cookie banner
on first visit. You may withdraw consent at any time by clearing
your browser cookies and declining on your next visit.
6. Cookies
We use a cookie consent banner to manage your tracking
preferences. The following cookies may be set:
| Cookie | Purpose | Duration |
|-----------------|----------------------------------------------|----------|
| Cookie consent | Stores your consent preference | 1 year | |
Umami analytics | Anonymous usage tracking (only with consent) |
Session |
You can control or delete cookies at any time through your browser
settings. Disabling cookies will not affect the core functionality
of this website.
7. Contact Form
When you submit an enquiry via our contact form, we collect the
following data:
- First and last name
- Work email address
- Telephone number (optional)
- Company name (optional)
- Your message
This data is used solely to respond to your enquiry and to
determine the appropriate training for your needs. We do not share
this data with third parties.
Retention: Contact form data is retained for as
long as necessary to process your enquiry and for any subsequent
contractual relationship, subject to applicable statutory
retention obligations.
Legal basis: Art. 6(1)(b) GDPR — processing necessary for pre-contractual
measures; Art. 6(1)(f) GDPR — legitimate interest in responding
to business enquiries.
8. Server Logs
Our web server automatically records access logs containing the
following data:
- IP address
- Date and time of access
- URL requested
- HTTP status code
- Browser and operating system type
- Referring URL
Retention: Server logs are retained for 30 days
and then deleted automatically.
Legal basis: Art. 6(1)(f) GDPR — legitimate interest in maintaining website
security and diagnosing technical issues.
9. Your Rights
Under the GDPR you have the following rights:
-
Right of access (Art. 15) — you may request a copy of the
personal data we hold about you.
-
Right to rectification (Art. 16) — you may request correction of
inaccurate data.
-
Right to erasure (Art. 17) — you may request deletion of your
data where no legal obligation requires us to retain it.
-
Right to restriction of processing (Art. 18) — you may request
that we limit how we use your data.
-
Right to data portability (Art. 20) — you may request your data
in a structured, machine-readable format.
-
Right to object (Art. 21) — you may object to processing based
on legitimate interest.
-
Right to withdraw consent (Art. 7(3)) — where processing is
based on consent, you may withdraw it at any time without
affecting the lawfulness of prior processing.
To exercise any of these rights, contact us at:
[email protected]
10. Right to Lodge a Complaint
You have the right to lodge a complaint with a supervisory
authority. The competent authority for Detroit Technical English
is:
Hamburgischer Beauftragter für Datenschutz und
Informationsfreiheit
Ludwig-Erhard-Str. 22, 7. OG
20459 Hamburg
Email: [email protected]
https://datenschutz.hamburg.de
11. Changes to This Policy
We reserve the right to update this privacy policy to reflect
changes in legal requirements or our services. The current version
is always available on this page. We recommend checking this page
periodically.