DeepL formality does not work as expected

[matzeeable]

Describe the issue

I have created a language "German (informal)" within my component, but the automatic DeepL suggestions still uses formal sentences.

I already tried

Describe the steps you tried to solve the problem yourself.

• I've read and searched the docs and did not find the answer there.
• Searched for issues within GitHub repository and did not find a similar ticket

To Reproduce the issue

1. Create an English string Are you sure?
2. Go to "German (informal)" language
3. Open the automatic translation and DeepL still suggests Sind Sie sicher? instead of Bist du sicher?

Expected behavior

DeepL's suggestion should be Bist du sicher?.

I also checked out the API of DeepL, and they provide a field for formality: https://www.deepl.com/docs-api/translating-text/response/

Sets whether the translated text should lean towards formal or informal language. This feature currently only works for target languages "DE" (German), "FR" (French), "IT" (Italian), "ES" (Spanish), "NL" (Dutch), "PL" (Polish), "PT-PT", "PT-BR" (Portuguese) and "RU" (Russian).Possible options are:

• "default" (default)
• "more" - for a more formal language
• "less" - for a more informal language

Server configuration and status

Docker, Weblate version 4.8.

 * Weblate: 4.8
 * Django: 3.2.6
 * siphashc: 2.1
 * translate-toolkit: 3.4.0
 * lxml: 4.6.3
 * Pillow: 8.3.1
 * bleach: 4.0.0
 * python-dateutil: 2.8.2
 * social-auth-core: 4.1.0
 * social-auth-app-django: 5.0.0
 * django-crispy-forms: 1.12.0
 * oauthlib: 3.1.1
 * django-compressor: 2.4.1
 * djangorestframework: 3.12.4
 * django-filter: 2.4.0
 * django-appconf: 1.0.4
 * user-agents: 2.2.0
 * filelock: 3.0.12
 * setuptools: 40.8.0
 * jellyfish: 0.8.2
 * openpyxl: 3.0.7
 * celery: 5.1.2
 * kombu: 5.1.0
 * translation-finder: 2.10
 * weblate-language-data: 2021.5
 * html2text: 2020.1.16
 * pycairo: 1.16.2
 * pygobject: 3.30.4
 * diff-match-patch: 20200713
 * requests: 2.26.0
 * django-redis: 5.0.0
 * hiredis: 2.0.0
 * sentry_sdk: 1.3.1
 * Cython: 0.29.24
 * misaka: 2.1.1
 * GitPython: 3.1.18
 * borgbackup: 1.1.17
 * pyparsing: 2.4.7
 * pyahocorasick: 1.4.2
 * python-redis-lock: 3.7.0
 * Python: 3.7.3
 * Git: 2.20.1
 * psycopg2: 2.9.1
 * psycopg2-binary: 2.9.1
 * phply: 1.2.5
 * chardet: 4.0.0
 * ruamel.yaml: 0.17.11
 * tesserocr: 2.5.2
 * akismet: 1.1
 * boto3: 1.18.26
 * zeep: 4.1.0
 * aeidon: 1.9
 * iniparse: 0.5
 * mysqlclient: 2.0.3
 * Mercurial: 5.9
 * git-svn: 2.20.1
 * git-review: 2.1.0
 * Redis server: 6.2.5
 * PostgreSQL server: 13.3
 * Database backends: django.db.backends.postgresql
 * Cache backends: default:RedisCache, avatar:FileBasedCache
 * Email setup: django.core.mail.backends.smtp.EmailBackend: smtp.mailersend.net
 * OS encoding: filesystem=utf-8, default=utf-8
 * Celery: redis://:WjUonTNhHsgHzp8iM66ofyALIz3u@weblate_redis:6379/1, redis://:WjUonTNhHsgHzp8iM66ofyALIz3u@weblate_redis:6379/1, regular
 * Platform: Linux 5.10.28-scaleway (x86_64)

Weblate deploy checks

System check identified some issues:

WARNINGS:
?: (security.W018) You should not have DEBUG set to True in deployment.

INFOS:
?: (weblate.I021) Error collection is not set up, it is highly recommended for production use
        HINT: https://docs.weblate.org/en/weblate-4.8/admin/install.html#collecting-errors
?: (weblate.I031) New Weblate version is available, please upgrade to 4.8.1.
        HINT: https://docs.weblate.org/en/weblate-4.8/admin/upgrade.html

System check identified 3 issues (1 silenced).

Additional context

Nothing.

[nijel]

The formality feature of DeepL is currently not utilized by Weblate, so both languages map to default German.

[github-actions]

This issue seems to be a good fit for newbie contributors. You are welcome to contribute to Weblate! Don't hesitate to ask any questions you would have while implementing this.

You can learn about how to get started in our contributors documentation.

[github-actions]

Thank you for your report; the issue you have reported has just been fixed.

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