Spell Check plugin crashes whenever I paste text containing: đď¸ or đď¸. I believe they are ZWJ emojis
WFM latest git Geany with default backend and en_AU dictionary, perhaps its dependent on your backend and/or language.
Just for the record they are Characters U+1F900 and U+1F982 [here](https://www.unicode.org/charts/PDF/U1F900.pdf) followed by VS16 [colour variant selector](https://en.wikipedia.org/wiki/Variation_Selectors_(Unicode_block)) not ZWJ.
Here they show as grinning and smiling rather than the symbols shown in the Unicode chart, but they are recent Unicode IIUC so maybe my font has not caught up yet.