How do I make use of the "lang" option when using a two file approach?

shiny
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I'm trying to add a "lang" attribute to the HTML produced by my shiny app that was added by this feature PR - Added lang attribute for accessibility and search-engine parsers by schloerke · Pull Request #3087 · rstudio/shiny · GitHub

Added the lang argument to shinyApp() that specifies document-level language within the app for the accessibility of screen readers and search-engine parsers.

However my code is set up using the two file approach (of ui.R and server.R) and I have nowhere in my code that calls shinyApp() - where would I set this option or do I need to restructure my codebase?

Thanks!

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Update: in the end I simply had to add tags$html(lang="en"), to the fluidPage()

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