Today, the modern Filipino alphabet may also be used to write all autochthonous languages of the Philippines and Chavacano, a Spanish-derived creole.
In 2013, the Komisyon sa Wikang Filipino released the Ortograpiyang Pambansa ("National Orthography"), a new set of guidelines that resolved phonemic representation problems previously encountered when writing some Philippine languages and dialects.
The 28 letters of the Alpabeto are called títik or létra, and each represents a spoken sound.
It was a major change to add these letters and thus modernise the writing system and to preserve sounds that are found in native Philippine languages.
After centuries of Spanish colonisation and the standardisation of Filipino as the national lingua franca, the vowels /e/ and /o/ became more common.