I hope you are talking about the text that has count on it.
If that is the case, then you are talking about this line.
Compliments <span>%d</span>
https://github.com/mistergiri/buddypress-compliments/blob/master/languages/bp-compliments-en_US.po#L29
That text, comes from here.
https://github.com/mistergiri/buddypress-compliments/blob/master/bp-compliments-core.php#L171
Please don’t edit the plugin code, your changes will be lost when you upgrade.
So its better you modify language strings.
Just copy this file
https://github.com/mistergiri/buddypress-compliments/blob/master/languages/bp-compliments-en_US.po
and place here
wp-content/languages/bp-compliments/bp-compliments-en_US.po
Download Poedit
Load this file in poedit.
wp-content/languages/bp-compliments/bp-compliments-en_US.po
Add your new string in this line.
https://github.com/mistergiri/buddypress-compliments/blob/master/languages/bp-compliments-en_US.po#L30
Example
#: bp-compliments-core.php:151
#, php-format
msgid "Compliments <span>%d</span>"
msgstr ""
to
#: bp-compliments-core.php:151
#, php-format
msgid "Compliments <span>%d</span>"
msgstr "My Compliments <span>%d</span>"
Then save the file in this folder.
wp-content/languages/bp-compliments/
Make sure .mo file generated.
If everything successful, you will see changes on your website.