
To change Blog “Comments” to another text, you can use CSS code.
#1. Change “Comments” on all blog posts
Use this code to Website Tools > Custom CSS
h3.comment-count span {
visibility: hidden;
}
h3.comment-count span:before {
visibility: visible;
content: "Notes";
}

Result:

#2. Change “Comments” on Blog Posts belong Specific Blog Page
First, you need to find Blog Page URL. Use this tool.
In my example, it is:
- #collection-6677756d03a4f15ba27ce9d8

Next, change it to this ID (replace # with dot . symbol):
- .collection-6677756d03a4f15ba27ce9d8
Next, use this code to Custom CSS box.
/* rename Comments */
.collection-6677756d03a4f15ba27ce9d8 {
h3.comment-count span {
visibility: hidden;
}
h3.comment-count span:before {
visibility: visible;
content: "Notes";
}
}

#3. Change “Comments” on specific blog post
You can edit Blog Post > Add a Code Block

Paste this code into Code Block.
<style>
h3.comment-count span {
visibility: hidden;
}
h3.comment-count span:before {
visibility: visible;
content: "Notes";
}
</style>
