Terms of use
On this page
By using this site you agree to these terms. They are short and meant to be read.
Using the content
- You may read, print and share links to any page for personal study or teaching.
- You may quote short passages or individual tables with a link to the source page.
- Please do not republish whole guides or substantial parts of them, on the web or in print, without written permission.
Accuracy
We work hard to make every guide accurate (see our editorial standards), but language descriptions always simplify, and the tools are rule-based. Content is provided for educational purposes, without warranty. For official documents, examinations or legal translation, consult a qualified professional.
External links
Links to other websites are provided for convenience. We are not responsible for their content.
Changes
These terms may be updated from time to time. The current version always appears on this page. Last updated 27 September 2026.