In minimal example
When I change proc to include polish ł instead of l:
proc echoAndModify(value: string): string =
result = "'" & value & "' modified by minimał"
In dev mode (browser) it works fine but in release mode (standalone) alert box shows:

Backend replies with content-type: application/json, maybe explicit charset would fix it: content-type: application/json; charset=utf-8.
ubuntu, libwebkit2gtk-4.0.so.37
In minimal example
When I change
procto include polishłinstead ofl:In

devmode (browser) it works fine but inreleasemode (standalone) alert box shows:Backendreplies withcontent-type: application/json, maybe explicit charset would fix it:content-type: application/json; charset=utf-8.