This qualitative, exploratory research study is positioned within the field of Family Language Policy (FLP). Contextualised in bilingual Malta, where Maltese is the majority language, the study inquires into the effects of a plurilingual family language programme on the language ideologies within English-speaking Maltese families. The programme was followed by four such families over a four-week period, during which data were collected via the participants' weekly entries into semi-structured family language journals. Upon the programme's completion, a second set of data was collected via one-off, semi-structured, family focus group interviews, for the purpose of triangulation. The findings highlight interrelated issues across the macro, meso and micro levels of language ideology, contributing to existing research by postulating the potential of a family language programme to prompt ideological shifts in support of heritage-language engagement, transmission and maintenance.