[Gambas-user] Gambas Playground language question

[Gianluigi]

If I try to write this code in Gambas Playground:
  Print Format(1234.54643, gb.Currency)
I get:
 1 234.54643
instead of $1,234.55 how it should be.

If I try this:
  System.Language = "en_US.UTF-8"
I get:
gbx3: warning: cannot switch to language 'en_US.UTF-8': No such file or
directory. Did you install the corresponding locale packages?

But the result of this:
  Print Format(Now, gb.LongDate)
is correctly in English:
July Tuesday 30 2019

I don't understand on what language is based playground

Regards
Gianluigi
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