According to the section'Handling of plurals' on http://doc.qt.io/qt-5/i18n-source-translation.html, for plurals an '(s)' is used instead of the 's' as suffx. You are refering to a different spec ?

In D14940#313136, @habacker wrote:

According to the section'Handling of plurals' on http://doc.qt.io/qt-5/i18n-source-translation.html, for plurals an '(s)' is used instead of the 's' as suffx. You are refering to a different spec ?

Yes, that is for plurals, not for decimals.

1.3 days is not a plural in the sense described there[1], it's a decimal number and it follows different rules.

[1] see how n is an integer not a float

I see - Qt lacks support for choosing the correct translation string for floating point values like this:

qreal value = 1.0;
tr("%n second(s)", nullptr, value).

which should return 1.0 second

qreal value = 1.34;
tr("%n second(s)", nullptr, value).

which should return 1.34 seconds

qreal value = 0.0;
tr("%n second(s)", nullptr, value).

which should return 0.0 seconds

and for strings:

int decimalPlaces = 2;
qreal MSecsInSecond = 1000;
qreal msecs = 1000.0
return tr("%n second(s)").arg(m_locale.toString(msecs / (MSecsInSecond * 1.0), 'f', decimalPlaces));

which should return 1.00 second

int decimalPlaces = 2;
qreal MSecsInSecond = 1000;
qreal msecs = 1100.0
return tr("%n second(s)").arg(m_locale.toString(msecs / (MSecsInSecond * 1.0), 'f', decimalPlaces));

which should return 1.10 seconds

In D14940#313853, @habacker wrote:

I see - Qt lacks support for choosing the correct translation string for floating point values like this:

qreal value = 1.0;
 tr("%n second(s)", nullptr, value).

which should return 1.0 second

Are you sure about that? Most answer i find online say 1.0 seconds is the right way to write it, basically, because if you write 1.0 seconds is because you know it's not 1 second, but something that rounds to 1.0 seconds, i.e in the 0.96 to 1.04 range with a precision of one digit.

FWIW, "1.0 seconds" is what I've always been taught.

https://forum.wordreference.com/threads/decimals-plural-singular.2054431/#post-10279600 listed many public organisations that are using signular for values between 1 and -1.

In D14940#315172, @habacker wrote:

https://forum.wordreference.com/threads/decimals-plural-singular.2054431/#post-10279600 listed many public organisations that are using signular for values between 1 and -1.

At this point, does it really matter though? Qt doesn't support what you want to do, so you need to convince them not us.