Filezilla is wrongly sorting files with diacritics

[postcd]

When i click the Filename column to sort, for example descending, I can see the files starting with these letters:

ž
š
č
ú
í
z
y
v
u

instead of grouping all diacritics characters on the top as seen above, it is natural to "group" z, ž together, ú, ů, u together, etc. in czech language proper and common sorting order is to first mentioned main letter (u) and then letters with diacritics.

FileZilla Client

---

Version: 3.63.0

Build information:

Compiled for: x86_64-pc-linux-gnu
Compiled on: x86_64-pc-linux-gnu
Build date: 2023-12-22
Compiled with: gcc (Debian 12.2.0-14) 12.2.0
Compiler flags: -g -O2 -ffile-prefix-map=/build/reproducible-path/filezilla-3.63.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wall

Linked against:

wxWidgets: 3.2.2
SQLite: 3.40.1
GnuTLS: 3.7.9

Operating system:

Name: Linux 6.1.0-26-amd64 x86_64
Version: 6.1
CPU features: sse sse2 sse3 ssse3 sse4.1 sse4.2 avx avx2 aes pclmulqdq rdrnd bmi bmi2 adx lm
Settings dir: /home/user/.config/filezilla/

[Tim Kosse]

Which language is FileZilla set to?

[postcd]

Replying to Tim Kosse:

Which language is FileZilla set to?

Settings / Language shows: "Default system language" and all texts of the app is in english. $ locale shows LANG=en_US.UTF-8 LANGUAGE=en_US:en