Dear @LeonidS .Thanks for reply but it seems that maybe you don't understand me. The '19' is not a static number.but a dynamic one. It is the comment counter that shows the number of comments in the comment block title. As the comments are being added, this number will be increasing automatically: 20, 21, 22, 23 etc.

Without your code change (in the default UNA comment block title), {0} is used in the language key _cmt_block_comments_title to display the comment counter, {0} being the argument to be pasted.

So my question is how to also get the dynamic comment counter to display in the code you provided above?

Hope that makes sense now. Thanks