Python - Highly proficient - Have built several Flask apps, use numpy extensively, prefer to plot in Matplolib, focus on class-based design.
HTML - Highly proficient - Familiar with Bootstrap 3 responsive design, use extensive custom CSS/LESS /JS.
PHP - Somewhat proficient - Have done some of the tutorials on www.someteachingsite.com and have run my own functions in HTML.
Ruby - Low proficiency - Am interested to learn as it looks to be a powerful web language.
R - Low proficiency - I prefer to use Python.
Basically, the more detail the better for each question! :D