unable to have greek characters appear in a text Label

[nass]

says here UTF-8...
but is that directly taken from the Os or KDe or smth?
cause a while ago i was trying to make my linux recognise UTF-8 using the info on this link
http://hektor.umcs.lublin.pl/~mikosm...x-unicode.html
so i started by

"export LC_ALL=en_US.UTF-8"

"export LC_ALL=en_US.UTF-8"

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and then it says

Applications started afterwards from the same terminal window should be aware of UTF-8. To check if that's the case, you could for example use the command wc. wc -c will tell you the number of bytes and wc -m the number of characters in a file or in data read from standard input (end typing with Enter and Ctrl-D). In a UTF-8 locale, if text contains non-ASCII characters, the number of bytes will be greater than the number of characters. For example:

user@host:~$ wc -c
Bär
5
user@host:~$ wc -m
Bär
4

and when i do that test using a greek alpha as opposed to the a with umlaut that is used in the example, i always get 4 as a result.. not 5.. so i am not sure UTF-8 is there as
running

locale

locale

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in a console at my pc states:

LANG=
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="en_US.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=en_US.UTF-8

LANG=
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="en_US.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=en_US.UTF-8

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[jacek]

says here UTF-8...

OK, what encoding do you use for string literals in your sources?

[MhmRhm]

I had similar problem but not with Greek chars. I use "material design" font as my buttons icons. since it is a font, it is practically a set of chars. You should find each character code, they are something like 0xFFDD or 0x4C and create a QString like bellow

QString(L'\uFFDD') for VS compiler and
QString("\uFFDD") for mingw.