PHP Number Format (Decimal Point) of ru_RU

[Shiro245]

Issue:
Decimals with comma are not accepted by a "padding" value measured in percents.

Details:
There is a data in Russian translation of WP 4.0 (ru_RU.po):

#: wp-includes/locale.php:177
msgid "number_format_decimal_point"
msgstr ","

This block changes default "." separator by new "," that is commonly used in Russia.
After that - many things (like "padding" with decimals measured in percents) stops to work at all. For example, some plugins using viewport calculation in their code, and outcome will be wrong with a comma.

Suggestion: It is allowed to use "." with decimals in Russia, so maybe roll it back?

[SergeyBiryukov]

The decimal comma is not only used in Russian, but also in ​many other languages.

It also depends on PHP locale, see #18460, #19593, #19624.

If there's a particular issue in WordPress core, we should fix it like we did in [18608] or [20675].

If there's an issue with a plugin, it should be reported to the plugin author.

[Shiro245]

Replying to SergeyBiryukov:

The decimal comma is not only used in Russian, but also in ​many other languages.

It also depends on PHP locale, see #18460, #19593, #19624.

If there's a particular issue in WordPress core, we should fix it like we did in [18608] or [20675].

If there's an issue with a plugin, it should be reported to the plugin author.

Thank you for an answer, Sergey!
Faulted plugin's author is aware of the issue now, and he probably will try to solve it from his side (override this value somehow, or maybe will not use decimals). But still, it can be a problem with other, different plugins and themes itself that performing calculation of paddings and other style things.
As temporary solution - I had changed "ru_Ru" to "en_EN" in my wp_config.php

Tnx!

[SergeyBiryukov]

But still, it can be a problem with other, different plugins and themes itself that performing calculation of paddings and other style things.

The number_format_decimal_point value from the .po file is only used in ​number_format_i18n() function, built to convert numbers to the format used by a specific locale. It should be used for output and not for calculations.

Calculations, however, depend on PHP locale, and changing that value does not affect it.

We should educate plugin and theme authors and deal with these issues on a case-by-case basis instead of making number_format_decimal_point non-localizable.

[SergeyBiryukov]

Closing per comment:3.