<summary>
Number of characters to estimate look-ahead for complex scripts.
Latin and all Kana are generally 1. Indic scripts are up to 15,
and most others are 8. Note that combining marks and variation
selectors can produce clusters longer than these look-aheads,
so this estimate is considered typical language use. Diacritics
must be tested explicitly separately.
</summary>
<summary> Number of characters to estimate look-ahead for complex scripts. Latin and all Kana are generally 1. Indic scripts are up to 15, and most others are 8. Note that combining marks and variation selectors can produce clusters longer than these look-aheads, so this estimate is considered typical language use. Diacritics must be tested explicitly separately. </summary>