Get Language OS

[molly]

Often programmers want to use p.3 (message translation), but uses p.1 to determine the language.

At least one other sane person that walks around on this earth

[CM630]

Trying to solve some issues of improperly detected OS Language in Win.

GetLanguageIDs; does not work. I change the display language of Windows, but GetLanguageIDs keeps showing the same value, maybe the language of the OS when installed.

Registry HKCU\Control Panel\Desktop\PreferredUILanguages seems to indicate the real display language.

Is there a bug, or that is what GetLanguageIDs is expected to do?

Also: How did the Lazarus forum succeed to create such a font mess in my post?

[jamie]

https://learn.microsoft.com/en-us/windows/win32/intl/national-language-support-functions

Pick one.

Note:
  Many of these require Vista or later.
Also:
  Most likely WideString.

[jwdietrich]

It has the advantage to also support OS X, e.g. macOS.

Try replacing your Mac code with this:

{IFDEF DARWIN}
  fbl := NSLocale.currentLocale.localeIdentifier.UTF8String;
{$ENDIF}

On newer versions of macOS the code should be replaced by:

{IFDEF DARWIN}
  fbl := NSStringToString(NSLocale.currentLocale.preferredLanguages.objectAtIndex(0).description);
{$ENDIF}