Plural form for monolingual po is lost in translation

[xperseguers]

Describe the issue

I created a source .po file like that:

# Group of attributes for member's details
msgid "Person.Group.Sponsors"
msgid_plural ""
msgstr[0] "Sponsor"
msgstr[1] "Sponsors"

This is thus a monolingual po file. It shows properly in Frontend:

However after translating those plurals, and committing to file system, the translated po files totally miss the plural definitions and store this instead:

msgid "Person.Group.Sponsors"
msgstr "Pate"

I already tried

• I've read and searched the documentation.
• I've searched for similar issues in this repository.

Steps to reproduce the behavior

1. Create a component whose file format is "gettext PO file (monolingual)"
2. Import/create the sample multilingual po file
3. Translate to another language (in the example German)
4. Commit
5. Check file system

Expected behavior

The localized po file is expected to store this instead:

msgid "Person.Group.Sponsors"
msgid_plural ""
msgstr[0] "Pate"
msgstr[1] "Paten"

(for a 2-plural form language and naturally with more forms in case of Croatian or other language dealing with more than 2 forms for plural).

Screenshots

No response

Exception traceback

No response

How do you run Weblate?

PyPI module

Weblate versions

• Weblate: 4.10.1
• Django: 4.0
• siphashc: 2.1
• translate-toolkit: 3.5.1
• lxml: 4.7.1
• Pillow: 8.4.0
• bleach: 4.1.0
• python-dateutil: 2.8.2
• social-auth-core: 4.1.0
• social-auth-app-django: 5.0.0
• django-crispy-forms: 1.13.0
• oauthlib: 3.1.1
• django-compressor: 3.1
• djangorestframework: 3.13.1
• django-filter: 21.1
• django-appconf: 1.0.5
• user-agents: 2.2.0
• filelock: 3.4.2
• setuptools: 44.0.0
• jellyfish: 0.8.9
• openpyxl: 3.0.9
• celery: 5.2.3
• kombu: 5.2.3
• translation-finder: 2.10
• weblate-language-data: 2021.7
• html2text: 2020.1.16
• pycairo: 1.20.1
• pygobject: 3.42.0
• diff-match-patch: 20200713
• requests: 2.26.0
• django-redis: 5.2.0
• hiredis: 2.0.0
• sentry_sdk: 1.5.1
• Cython: 0.29.26
• misaka: 2.1.1
• GitPython: 3.1.24
• borgbackup: 1.1.17
• pyparsing: 3.0.6
• pyahocorasick: 1.4.2
• python-redis-lock: 3.7.0
• Python: 3.8.10
• Git: 2.25.1
• psycopg2: 2.9.3
• ruamel.yaml: 0.17.19
• Redis server: 5.0.7
• PostgreSQL server: 12.9
• Database backends: django.db.backends.postgresql
• Cache backends: default:RedisCache, avatar:FileBasedCache
• Email setup: django.core.mail.backends.smtp.EmailBackend: 10.0.1.10
• OS encoding: filesystem=utf-8, default=utf-8
• Celery: redis://localhost:6379, redis://localhost:6379, regular
• Platform: Linux 5.4.0-91-generic (x86_64)

Weblate deploy checks

n/a

Additional context

First discussed here: #7053

[nijel]

I can reproduce this in case the string existed before in the translated file as singular, can you please confirm that?

Before Weblate doing the changes, did the file contain following?

msgid "Person.Group.Sponsors"
msgstr ""

[xperseguers]

I can reproduce this in case the string existed before in the translated file as singular, can you please confirm that?

Before Weblate doing the changes, did the file contain following?

msgid "Person.Group.Sponsors"
msgstr ""

Yes, that's quite possible because some of those labels have indeed switched from singular to plural form.

Manually applied your commit #d71663c and checked, that works!

Thanks for having investigated and fixed it.

[github-actions]

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