Prayer is a central practice in the faith lives of many Christians. Prayers can be both 'horizontal', emphasising community and fellowship, or 'vertical', focusing on a personal relationship with God without other interlocutors. Speakers with more than one language in their repertoire may select what language they want to use during prayer, a phenomenon known in sociolinguistics as 'language choice'. As language choice is mainly shaped by social context and formed in interaction, language choice in vertical prayer provides an interesting context to study. How do multilingual Christians employ their language repertoire in conversation with God? What do these patterns of language choices symbolise? Drawing on ethnographic fieldwork and interviews conducted in an apostolic charismatic church in the Netherlands, this paper demonstrates how multilingual Christians' language choices in prayer reflect broader societal language ideologies. In addition, code-switching in prayers reveals how believers play around with language in strategic ways to convey a sense of reverence, spirituality, and emotional connection with God.