"هٰذا قَلَم اَلْأُسْتاذة."
Translation:This is the professor's pen.
When writing in arabic (with arab keyboard, not using a word bank) هذا counts as a wrong word, because there's no little alif above. This should not be a problem, since other words can be written without diacritics. My keyboard doesn't even have that symbol.
Yes many people complained about that. Hopefully the reports will get the contributors to remove this restriction.