Budget: 50000 UAH Deadline: 30 days
Speech recognition is possible using third-party API services (personal experience and accordingly the proposal of ChatGPT, Google Cloud API - both services are paid) - deadline 3-4 days
Analyzing grammatical and syntactical errors with ChatGPT is more or less tolerable, although not always accurate (!!!).. deadline is another 3-4 days
Analyzing fluency and pronunciation is more difficult - at least two weeks and even less accurate (!!!) than analyzing grammar and syntax
If it is necessary to create a database of users and their errors (most likely it will be, but if it is included in the task) the deadline should be multiplied by 2, the price by 1.5