•normalize — Unicode normalization

•normalize text puts text into Unicode normalization form NFC. NFC uses one code point for a letter and its accent wherever Unicode has one. form •normalize text names the form: "NFC", "NFD", "NFKC" or "NFKD". NFD writes each accented letter as a base letter followed by combining marks. The K forms also replace compatibility characters, such as the ligature fi, with ordinary ones.

•ucs "NFD" •normalize "é"   ⍝ [101 769]ₓ
"NFKC" •normalize "fi"       ⍝ "fi"

Errors: DOMAIN for an unknown form, or an argument that isn’t text.