I want to display a question which consists of checkboxes with the other option, on which user can enter some text to _other_ option. Something like this:
What programming languages do you know?
[ ] Java
[ ] JavaScript
[ ] Typescript
[ ] Others - Please enter your language name.
The "checkbox" question has the 'hasOther' property. You can set it to true and I believe you will exactly your case implemented.
Great, That worked!

However, I want to remove (describe) here, is there a way to do that?
You can set the https://surveyjs.io/Documentation/Library?id=questioncheckboxmodel#otherText property to change this text
I must say, it's a great library. Cheers mate! Thank you for your support and great work.