Comments title not translated

The title above the comments was not translated to dutch in my setup of understrap 0.8.2 (rest of the theme was):

One thought on… / x thoughts on…

I found that there are two implementations for plural text in comments.php in the root of the theme, one using an if/else statement, and one using _nx. The languages/nl_NL.po file did not correspond to this.

My solution is to make a languages/nl_NL.po (and compiled .mo) in my child theme and accomodate for all (even though translation will never be used, so I could have skipped that one):

#: ../comments.php:28 
msgctxt "comments title"
msgid "%1$s thought on “%2$s”"
msgid_plural "%1$s thoughts on “%2$s”"
msgstr[0] "%1$s reactie op “%2$s”"
msgstr[1] "%1$s reacties op “%2$s”"
        
#: ../comments.php:28
msgctxt "comments title"
msgid "One thought on “%s”"
msgstr "Eén reactie op “%s”"

And then add this to functions.php in my child theme:

load_child_theme_textdomain( 'understrap', get_stylesheet_directory() . '/languages/' );

This way I don’t have to alter the parent theme.