Spanish numbers like ciento veintitrés not correctly converted

[ffeldhaus]

The number "ciento veintitrés" in Spanish is converted to 100 instead of 123. It seems "veintitrés" is not recognized.

[ffeldhaus]

The issue here seems to be that veintitrés (with accent) is not matched while veintitres (without accent) is matched. Ideally words with and without accented characters are matched.