this is a piece of advice to developers who face problem deploying shiny app in foreign languages
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save (reopen with encoding) your file with UTF-8 encoding
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copy and paste your code in a new shiny web app file
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divide your code into ui.r and server.r
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add all libraries used in ui.r and server.r
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add this line of code depending on the language used( in my case korean)
Sys.setlocale("LC_ALL", "korean") to ui.r -
run the app on the local machine, if you face no errors then you are ready to deploy
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update all your packages
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make sure you have the latest version on rsconnect package
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deploy successfully
this community helped me alot and I want to give back
I hope this help you guys in the future
Best Regards
Ahmed Ali
PhD candidate
Chung Ang University