Missing Japanese translation

[Ryuichi Yamada]

I'm sorry, this is not a bug.

It turned out that new version of Muon has not been released for years, and at the time of the latest release, the translation has not yet been done.

The reason why it was available on my KDE Neon system was that it was actually Unstable Edition, which features very cutting-edge KDE
applications. I had forgotten which edition of Neon was I using.

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What I expected: The Japanese translation for Muon is available
What happened instead: It is not available

The package is Muon 4:5.8.0-1ubuntu5, and my system is running Kubuntu 22.04 LTS.

There is a muon.mo in /usr/share/locale/ja/LC_MESSAGES, but it does not contain any translation data.
The mo file in Kate text editor looks like this: https://i.imgur.com/NAqw8Pt.png

The software was translated into Japanese 3 years ago, and as far as I know, the translation is available in KDE Neon Unstable Edition.

Thank you in advance.