Here are the categories, slugs for both Languages and Subjects, which can be found on the left side of the Articles hub page.
Subjects' slugs:
code-foundations
computer-science
cybersecurity
data-science
data-visualization
developer-tools
game-development
machine-learning
math
mobile-development
web-design
web-development
Languages' slugs:
bash
c-sharp
c-plus-plus
go
html-css
java
javascript
kotlin
php
python
r
ruby
sql
swift