German - Russian

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- Database backup and backup loading features added.
- Reverse question option added to the test.
- Sentence writing test added to lessons.
- Section skipping added to lessons.
- Up to 30 word notifications can now be added.
- You can now generate audio files from sentences.
- On some devices, the error of controlling the Audio player from outside the application has been fixed.
- The letter limit for adding words has been increased to 25.
- And many more things.