This study investigates the development of canonical proportion (CP), an indicator of speech development, across diverse language and environmental contexts. Using the Speech Maturity Dataset (SMD) comprising 366 children, aged 0;2-6;4, across 10 different languages and cultures, we explore the influence of multilingual exposure, language syllable complexity, and community type (industrialised, non-industrialised) on CP. We find that monolingual children display higher CP measures than their multilingual peers. In addition, CP is higher for children learning languages with simple syllable complexity than those with more complex syllables. We also find no significant differences in the CP trajectory of children from industrialised versus non-industrialised communities. Integrating these findings in the broader literature, we highlight the importance of diversifying participant samples to capture the complex relationship between language exposure, social environment, and language development.
Although a phonology-based coding system (i.e. Pinyin) is universally taught to beginning readers in mainland China, in Macau no such system is taught to children learning Cantonese. To examine whether providing such a system to Cantonese-speaking children is beneficial for reading development in both first (Cantonese) and second (English) language, the present study first attempted to implement a Cantonese phonology-based coding system (i.e. Jyutping) intervention with Cantonese-English bilingual children in Macau. Participants were 67 K3 children studying in a local kindergarten. Compared with the control group (N = 33, mean age 5.76 years), after five sessions of training, the children with Jyutping training (N = 34, mean age 5.85 years) showed a significant increase in Chinese and English phonological awareness at both syllable and phoneme levels. These results highlight the effectiveness of phonology-based coding systems in early literacy development and underscore the educational value of incorporating Jyutping instruction in kindergarten settings.

