Category:Tagalog pre-1977 forms

Tagalog spellings of words affected by the spelling reform introduced in Mga Batayang Tuntuning Sinusunod sa Pagsusuring Aklat by the Institute of the National Language (Surian ng Wikang Pambansa or SWP). Spellings affected were spellings containing the vowel pairs /ia/, /ie/, /io/, /iu/ /ua/, /ue/, /ui/, /uo/, where the new spelling have the ⟨i⟩ or ⟨u⟩ retained with ⟨y⟩ or ⟨w⟩ inserted after, or replaced with ⟨w⟩ and ⟨y⟩.