Module normalize 

Unicode normalization helpers used before matching.

Functions

contains_kana

Returns true when text contains hiragana or katakana.

fold_width_compatible_char

Folds width-compatible dash and prolonged-sound variants to ASCII -.

hiragana_to_katakana

Converts hiragana characters in text to katakana.

katakana_to_hiragana

Converts katakana characters in text to hiragana.

normalize

Applies NFKC normalization, lowercasing, and dash-width folding.