Microsoft automatic translation fails for Serbian ("sr")

Describe the issue

For the locale Serbian - "sr" the automatic translation with Microsoft Translator does not work. There are no "Automatic suggestions" and the "Automatic translation" tool does not get any texts.

I already tried

[X] I've read and searched the documentation.
[X] I've searched for similar issues in this repository.

Steps to reproduce the behavior

Add Microsoft Translator to Weblate
Create a project and component with the language "Serbian" - "sr"
Go to /translate/{project}/{component}/sr/?q=state:<translated and see that no texts are suggested

Expected behavior

Automatic suggestions should be shown for Serbian.

Screenshots

No response

Exception traceback

No response

How do you run Weblate?

Docker container

Weblate versions

Weblate: 4.18.2
Django: 4.2.2
siphashc: 2.1
translate-toolkit: 3.9.2
lxml: 4.9.2
Pillow: 9.5.0
nh3: 0.2.13
python-dateutil: 2.8.2
social-auth-core: 4.4.2
social-auth-app-django: 5.2.0
django-crispy-forms: 2.0
oauthlib: 3.2.2
django-compressor: 4.4
djangorestframework: 3.14.0
django-filter: 23.2
django-appconf: 1.0.5
user-agents: 2.2.0
filelock: 3.12.2
rapidfuzz: 3.1.1
openpyxl: 3.1.2
celery: 5.3.1
django-celery-beat: 2.5.0
kombu: 5.3.1
translation-finder: 2.15
weblate-language-data: 2023.5
html2text: 2020.1.16
pycairo: 1.24.0
PyGObject: 3.44.1
diff-match-patch: 20230430
requests: 2.31.0
django-redis: 5.3.0
hiredis: 2.2.3
sentry-sdk: 1.26.0
Cython: 0.29.35
misaka: 2.1.1
GitPython: 3.1.31
borgbackup: 1.2.4
pyparsing: 3.0.9
pyahocorasick: 2.0.0
python-redis-lock: 4.0.0
charset-normalizer: 3.1.0
Python: 3.11.4
Git: 2.30.2
psycopg2: 2.9.6
phply: 1.2.6
ruamel.yaml: 0.17.32
tesserocr: 2.6.0
boto3: 1.26.164
zeep: 4.2.1
aeidon: 1.12
iniparse: 0.5
mysqlclient: 2.2.0
Mercurial: 6.4.5
git-svn: 2.30.2
git-review: 2.3.1
Redis server: 6.2.12
PostgreSQL server: 13.10
Database backends: django.db.backends.postgresql
Cache backends: default:RedisCache, avatar:FileBasedCache
Email setup: django.core.mail.backends.smtp.EmailBackend: mailz.porsche.co.at
OS encoding: filesystem=utf-8, default=utf-8
Celery: redis://localhost:6379/1, redis://localhost:6379/1, regular
Platform: Linux 3.10.0-1160.90.1.el7.x86_64 (x86_64)

Weblate deploy checks

System check identified some issues:

INFOS:
?: (weblate.I021) Error collection is not set up, it is highly recommended for production use
        HINT: https://docs.weblate.org/en/latest/admin/install.html#collecting-errors

System check identified 1 issue (1 silenced).

Additional context

It seems that Microsoft translator treats "sr" as "sr-Latn".

For example:

POST https://api-eur.cognitive.microsofttranslator.com/translate?api-version=3.0&from=en&to=sr
Content-Type: application/json

[{"Text":"Hello World!"}]

gets the answer

[
  {
    "translations": [
      {
        "text": "Zdravo svete!",
        "to": "sr-Latn"
      }
    ]
  }
]

I think this has to be added to the language_map: https://github.com/WeblateOrg/weblate/blob/5674acc39e21ea092c0d2fba89569b802315595a/weblate/machinery/microsoft.py#L26

WeblateOrg / weblate

Microsoft automatic translation fails for Serbian ("sr") #9565