This vs Łódź

Informations

The Vietnamese alphabet (Vietnamese chu Quoc Ngu, script for the national language) uses the modern Latin writing script. It uses the Latin script that was originally created by Francisco de Pina, a Portuguese missionary. The Vietnamese alphabet has 29 letters. Five additional diacritics are used to indicate tone (as in a), a), a), a and a.

Complex vowels and numerous letters with diacritics can stack twice on one letter, such as e.g. The complex vowel system and the large number of letters with diacritics, which can even stack twice on the same letter (e.g. Diacritics are used to produce a precise sound transcription of tonal languages.

Source: Wikipedia