Just click the circle icon in the lower right corner of a text field. The popup that appears has a list of languages where you can select English (UK).

Please contact us at https://languagetool.org/legal/ - this is a bug and we will fix it, but for that, we need more detailed information.

Thanks for your feedback. Could you contact us directly (https://languagetool.org/legal/) so we can work on the performance issue? Many performance bugs have been fixed already, so we need specific examples of where it's still slow.

Thanks for your feedback. As we cannot reproduce these issues, could you contact us directly (https://languagetool.org/legal/) so we can understand when exactly this happens?