why it didn't accept my "ori" instead of sau?
It should. Report it.
It should, b'cuz "sau" it's correct without "-" just if it can have the same sense as "ori".
Esti tacut sau vorbesti?
When you are romanian and learn romanian fron english and you realize that you aren't the single one doing this.
Tacut ori vorbitor why not
Because 'vorbitor' means 'speaker'. The correct answer would have been 'vorbeşti' - '(you are) talking'
Taci sau vorbești
Why do you need a?