Here you can find HTML syntax errors found on various web pages. They can be found on almost every website. In addition, you can see what the problems with the certificate are. More options are planned here.
A tool can be used for translations to discuss the text into sentences and to translate by focusing on each sentence.
There are also some games to try.
Data Protection & Terms of Service.
Here you can leave suggestions for improving the page and report any problems you find. Experts in this language are especially expected to correct typos, as the texts have been generated with an automatic translation tool.