hindi, conjunct plus combining character (no webfont)
Test passes if the two boxes are identical.
[Exploratory test] :first-letter will select a devanagari two-consonant conjunct and a combining character at the start of a line.
This combination is not an extended grapheme cluster, so it will require tailoring of the browser's algorithm for dealing with Indic scripts. The grapheme cluster is limited to the first base character plus the virama.
Downloaded WOFF fonts are used for other tests, but for this particular test you can apply a specific font on your system by typing its name in the following box: