On a Stack Exchange site, you can get a link to a comment if you click on the timestamp next to the comment. The exact URL might be a bit different depending on the way you arrived to the comment. In particular, the link you get after visiting an answer might look like this:
https://meta.stackexchange.com/questions/357653/is-there-a-site-for-greek-language/357654#comment1194927_357654. You can check for yourself that you get this link if you visit this answer and then click on the timestamp. And also that said link actually goes to the comment.
Probably a bug: The links do not work the same way, if you change the part of the URL corresponding to the title. In particular, this might mean that if the title was edited, the link you got from the timestamp before the edit no longer works.
In this example, if I change to the URL corresponding to the previous title of the question, i.e., to
https://meta.stackexchange.com/questions/357653/is-there-a-site-for-greek-language-exchange/357654#comment1194927_357654 then this link no longer brings you to the comment, but it goes to an answer instead.
I looked into links based on answers because I wanted to find whether there is some way of getting an URL of a comment, which works also for questions with several pages of answers. However, I did not find a way to shorten such a link. (Since one user complained that there are problems with this when writing comments. In a comment, there is a character limit, which is an incentive to shorten links when possible.)
Additional question: Is there a way of linking to comments, which would be reliable even for a comment under an answer which is not necessarily on the first page of answers (i.e., not displayed together with the question), where the link would not be excessively long?