Add custom languages

### Is your feature request related to a problem? Please describe.

I just want to add few languages like java python react and next but I can't add them So, In my opinion it would be great to have a feature of adding languages as need instead of some random languages

### Describe the solution you'd like

I would like to request a feature that would allow me to add me language of my own like the other properties I type
"&lang=python,java,react,javascript,nextjs"

### Describe alternatives you've considered

_No response_

### Additional context

_No response_