User: A person interacting with the platform, including both guests who view content and registered users with accounts.

Guest: A user who can only view content in read-only mode without creating an account or interacting with features like quizzes or forums.

Registered User: A person who creates an account, whether or not they actively interact with quizzes, forums, or other features of the platform.

Admin: A super registered user with special permissions to manage and oversee forums, quizzes, and users when needed. They have more control than regular users.

Username: Used for login purposes.

Nickname: Publicly visible name; used in forums, comments, etc.

Login: Users can access the application or website by entering their username and password.

Authentication: The steps of establishing identity and verifying permission to access the platform.

User Level: A classification that indicates a user's proficiency level in a language, helping to tailor learning experiences to their skills (e.g., beginner, intermediate, advanced).

Profile Page: A page that displays a user's quizzes, favourite quizzes, forum interactions, and personal stats.

Quiz: A tool for learning a language that can be provided by the app or created by users using provided quiz creation tools. It has one or more questions on a topic.

Question: A prompt in a quiz that asks for an answer. It can be a multiple-choice question or require a written response which helps users test their knowledge in language learning.

Forum: A platform where users can share posts and comment on others about language learning.

Forum Post: An entity in the forum where users can ask questions or share information about language learning.

Comment: A response that can be an answer to a question, a question itself, or feedback on the information shared, but must relate to the topic of the post.

Misinformation Tag: A label that can be added to incorrect quizzes, misleading questions, or forum posts and comments that contain false information.

Hateful Speech Tag: A tag that can be added to forum posts which contains hate speech, slang, racist discourses etc.

Forum Tag: A label used to categorize forum posts. (e.g., #question, #information, #meme).

Quiz Tag: A label used to categorize quizzes, helping users identify the topic or type of quiz (e.g., #grammar, #vocabulary, #culture).

Quiz Difficulty Tag: A label used to indicate the level of challenge of a quiz, helping users choose quizzes that match their skill level (e.g., #easy, #medium, #hard).