It looks like we don't have the translated page you're looking for, but we do have other content in English and offer support in English.
You can edit subtasks in the same way you edit regular tasks. When you open a subtask you can add assignees, share the subtask, set start and due dates, and more. You can even give a subtask its own subtasks. You can also quickly edit subtasks from Task view and List view.
Navigate to the needed folder, project, or space and switch to List view.
Click the parent task where your subtask lives to open the Task view panel.
Click the subtask field to expand the task's subtask list (the subtask list may already be expanded when you open the task).
From the subtask list:
Right-click a subtask. You'll see a menu with a list of options to edit the subtask, open it in a separate tab, and delete it.
Hover over a subtask. A calendar icon appears on the right side of the subtask's row. Click the icon to schedule or reschedule the subtask.
Click an assignee's avatar (or the default assignee icon) and select an assignee from the drop-down.
Click the checkbox next to the subtask's name to mark it as completed.
Navigate to the needed folder, project, or space and switch to List view.
Click the arrow to the left of the parent task's name and:
Right-click a subtask. You'll see a menu with a list of options to edit the subtask, open it in a separate tab, and delete it.
Hover over a subtask. A calendar icon appears on the right side of the subtask's row. Click the icon to schedule or reschedule the subtask.
Click an assignee's avatar (or the default assignee icon) and select an assignee from the drop-down.