Diglossia: A lesson that explains the Persian diglossia, especially apparent in Iran. Elements that touch upon it can be found in several lessons, but it is never explained throughoutly and seperately.

Compound Verbs: Already mentioned sparsely in several lessons, but Lesson(s) on a list of the most used compound verbs will definitely be included in a major future update.

French Loanwords: Similar to diglossia, it gets mentioned in the current version, but deserves its own seperate lesson.

Tanvin: At least a part of a reading & writing lesson should mention tanvin in Persian.

Tashdid: Already indirectly introduced in a pronunciation lesson, deserves to be mentioned in a reading & writing lesson, too.

Reading & Writing: Lessons on reading & writing expanding elements that have been introduced in the pronunciation lessons.

Negation: Lesson(s) on negation, not all crucial details are explained in the currently available lessons.

Pronouns: An exclusive lesson for pronouns?

Formal speech: Lesson(s) explaining differences between informal and formal speech.

Nouns: Lesson(s) on nouns and their possible inflections?

Adverbs: Lesson(s) on adverbs?

Prepositions: Lesson(s) on prepositions?

Sentence Structure: Lessons on Sentence Structure

Quiz Time: Mini games for practicing vocabulary and conjugations?

Settings Menu: Including mostly audio settings, probably hard to implement..