Ireland’s 2018 referendum on the Eighth Amendment, in which a majority of the Irish electorate voted to repeal the state’s quasi-total ban on abortion, saw important public discussions regarding Irish national identity in the twenty-first century. From a linguistic perspective, this begs the question of what role language played in the construction of national identity during the referendum campaign. This paper will examine Irish English features in the referendum campaign’s linguistic landscape and the extent to which they were used to index national identity. While there has been a significant amount of research on language ideologies connected to Irish, there has been little attention paid to Irish English and its relationship with national identity in the linguistic landscape literature. Drawing on a dataset of 1680 LL items collected from the 2018 referendum campaign (including campaign posters, placards, banners and stickers), this paper examines signs containing distinctive Irish English features, employing a qualitative, multimodal approach to the indexing of national identity. Specifically, it asks whether and under what conditions it is possible to claim that the use of Irish English features can be taken to index national identity.