Arch Linux

jronald

Member

Registered: 2022-05-09

Posts: 209

[SOLVED] locale problems (Qt Creator & console)

When run an application in Qt Creator, "Application Output":

Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.
Qt depends on a UTF-8 locale, and has switched to "C.UTF-8" instead.
If this causes problems, reconfigure your locale. See the locale(1) manual
for more information.

locale info

$ locale
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=zh_CN.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

How to fix the problem in Qt Creator?
How to fix the problem for locale (locale: Cannot set LC_ALL to default locale: No such file or directory)?

Last edited by jronald (2026-01-09 08:39:47)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,565

Re: [SOLVED] locale problems (Qt Creator & console)

When you did your installation, did you configure your locale?

https://wiki.archlinux.org/title/Instal … calization

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jronald

Member

Registered: 2022-05-09

Posts: 209

Re: [SOLVED] locale problems (Qt Creator & console)

When you did your installation, did you configure your locale?

Yes

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 72,057

Re: [SOLVED] locale problems (Qt Creator & console)

And did you configure it correctly?

locale -a
localectl

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jronald

Member

Registered: 2022-05-09

Posts: 209

Re: [SOLVED] locale problems (Qt Creator & console)

$ locale -a
C
C.utf8
en_US.utf8
POSIX

$ localectl
System Locale: LANG=en_US.UTF-8
    VC Keymap: us
   X11 Layout: us
    X11 Model: pc105+inet
  X11 Options: terminate:ctrl_alt_bksp

Operating System: Arch Linux 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.1
Kernel Version: 6.18.3-arch1-1 (64-bit)
Graphics Platform: Wayland

Last edited by jronald (2026-01-09 08:08:44)

seth

Member

From: Don't DM me only for attention

Registered: 2012-09-03

Posts: 72,057

Re: [SOLVED] locale problems (Qt Creator & console)

LC_MONETARY=zh_CN.UTF-8

https://wiki.archlinux.org/title/KDE#Pl … e_settings ?

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jronald

Member

Registered: 2022-05-09

Posts: 209

Re: [SOLVED] locale problems (Qt Creator & console)

Both problems are solved by deleting "~/.config/plasma-localerc",
though I don't know why.

Thanks

Last edited by jronald (2026-01-09 08:39:32)