A DESCRIPTION OF THE PROBLEM :
NumberFormat.getCurrencyInstance().format(x) use the wrong decimal point for locale fr_CH. The localized pattern show that it have the right decimal point but it does not use for formatting. Instead of the expected comma there is a point.

REGRESSION : Last worked in version 11

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Java Version: 11.0.11+9
Currency: -1 234,12 CHF with pattern: # ##0,00' '¤
Number: -1 234,125 with pattern: # ##0,###
ACTUAL -
Java Version: 17.0.2+8-LTS-86
Currency: -1 234.12 CHF with pattern: # ##0,00 ¤
Number: -1 234,125 with pattern: # ##0,###

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import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;

public class CurrencyFormatTest {
    public static void main( String[] args ) {
        System.err.println( "Java Version: " + System.getProperty( "java.vm.version" ) );
        Locale locale = new Locale( "fr", "CH" );
        NumberFormat javaFormat = NumberFormat.getCurrencyInstance( locale );
        String str = javaFormat.format( -1234.125 );
        System.err.println( "Currency: " + str + " with pattern: " + ((DecimalFormat)javaFormat).toLocalizedPattern());

        javaFormat = NumberFormat.getNumberInstance( locale );
        str = javaFormat.format( -1234.125 );
        System.err.println( "Number: " + str + " with pattern: " + ((DecimalFormat)javaFormat).toLocalizedPattern());
    }
}

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FREQUENCY : always