(yes I know there's a wiki page for it here but i'm talking about more simple terms, so people don't have to gather stuff from separate pages)
Scratch, like any other community, has its own inside terms and language, so here are some common words you'll find. Feel free to search them up on the Scratch Wiki to learn more.

LIST OF POPULAR SCRATCH TERMS

PLATFORM:

Scratcher - A user of Scratch. It can also refer to someone with the ‘Scratcher’ status.
New Scratcher - A Scratcher who is new to the platform (usually about 2 weeks or so).
Featured Project - A project, handpicked by the Scratch Team, that is shown on the front page for everyone, earning massive views, loves, favourites and activity.
Scratch Team (ST) - The developers and moderators of Scratch.

PROJECTS:

Views - How many views a project gets, represented by an eye icon underneath the project on the right.
Love-it - Also known as loves, likes or hearts, it shows how many people like the project.
Fave-it - Also known as favourites or stars, it shows how many people like the project, EXCEPT it shows up on the user (who favourited the project)'s profile, publicly.
Description - The description of the project, usually put in the Instructions or Notes and Credits section.
Instructions - A section of the project page where one can write instructions on how to use the project.
Notes and Credits - A section of the project page where one can give credits to the people who made assets from the projects, as well as notes on the project.
Remix - A button on a project page that allows a user to copy the project and make their own changes while giving credit to the original owner.
See Inside - A button on a project page that allows a user to “look inside” the project and see the code inside.

STUDIOS:

Curator - Someone who is invited to help out with a studio. They can add and remove projects.
Manager - Someone who is a trusted curator, but with a label. They can add projects, invite curators and remove curators.
Host - (usually) the owner of the studio. Ownership can be transferred, but the host cannot be a New Scratcher. They can add projects, remove projects, invite curators, remove curators; and change the studio description, thumbnail and title. They cannot be removed by another manager since they are the host.
Invite - When a manager or the host invites someone to curate a studio.

COMMUNITY:

Follower - Your follower count. You can follow someone by pressing the purple ‘follow’ button on their profile.
Comment - When someone comments on a studio, project or profile. It can range from helpful feedback to a friendly greeting.
Report - If an inappropriate, copyrighted or stolen project is shared, someone may report it.
Mass-report - When someone reports a project multiple times for no reason, leaving it to get taken down.
Warning - A warning from the Scratch Team for doing something against the Community Guidelines.
Spammer - Someone who repeatedly comments on something with the intention of angering the person who owns the project/studio/profile.
Bot - A spammer, but automated by someone, and used to destroy the Scratch servers. Due to its code, bots can usually spam at fast speeds, bypassing the cooldown.
Chatroom - Usually a project or studio, where someone can comment as if they are on the user's profile (because profile comments take time to load).

FORUMS:

Signature - A specific piece of text that shows up on ever post a user makes.
Evil Kumquat - A joke started by the Scratch Team member cheddargirl, where their forum signature was no longer compatible with the forums

adding more later

It's really nice that you want to help out with a guide! However, we have a number of them in the forums already and we don't have a good way to showcase any more. If you want to make a guide in a Scratch project, that would be fine. You could advertise it in the “Show and Tell” section too.

There are lots of other ways to help out in the forums too. Helpful Scratchers are always welcome in the “Questions About Scratch”, “Help With Scripts”, “Requests” and other sections. Just look around and ask questions