Effaith amlder iaith yn y cartref ar wybodaeth oedolion o’r system o greu enwau lluosog yn y Gymraeg (The effects of language frequency on adults knowledge of the Welsh plural system)

The aim of this study was to investigate the role of quality and quantity of linguistic input (i.e. to what extent are individuals exposed to a language from different sources during their lives) on Welsh-English bilingual adults’ acquisition of the Welsh plural system. Previous research found differences between bilingual children from different language backgrounds. While it is possible to reduce the difference with an increase in exposure to the language, however, when the structures are complex how quickly (if at all) can any difference be reduced, especially when the system is used inconsistently across adults. However, to what extent these differences reduce is unclear, as no research has been conducted on individuals over age 11. The aim of the study was to assess Welsh-English bilingual adults’ abilities to create plural words in Welsh, in order to trace the extent the differences seen between children have reduced over time.