Zhuyin Input Interface on a Device

One of a pair of alternate key planes of a virtual keyboard is presented. Each key plane includes a partial set of phonetic symbols from a phonetic alphabet. A first key plane includes a set of initial phonetic symbols. A second key plane includes a set of final phonetic symbols and a set of tone marks. The virtual keyboard automatically switches between the first key plane and the second key plane upon receiving a predetermined set of user input triggers. A sequence of Zhuyin phonetic symbol input is received from a user interface, where the sequence of Zhuyin phonetic symbols represents phonetic spellings of a plurality of Chinese characters. User input to select one of a list of Chinese character combinations is received. The selected Chinese character combination is entered as text input in the user interface.