Japanese rules: seki are ignored
Chinese rules: captured stones are ignored
WikiHow rules:
Add together the seki stone total and the captured stone total. Once you have determined your seki stone total and your captured stone total, you should add these two numbers together
Probably written by an AI. 
Well, GPTJ fails even more miserably:
How to determine the score after a game of go: a complete solution
Go is one of the oldest board games. In this post, we will try to answer the following question:
Q: How do I calculate the total score after a game of go?
If you are new to go, you probably don’t know the rules. However, you can use Go Play for Chrome as a tool for go-playing.
Let’s suppose that you play go at the beginner level in Go Play. If you do not know the rules of go, you should learn them first.
Here is a solution that you can use to calculate your score after a game of go.
You can find the details of the rules in this tutorial.
Here is a summary:
There are 19 points for black, 21 points for white, 1 point for losing and 10 points for black stones.
Makes one wonder how accurate the other answers are on WIkiHow.
Makes me wonder why someone who knows better doesn’t fix it up … it’s a wiki, right?
And they want it to drive my car
Please don’t revolt @yebellz
Don’t worry, we wouldn’t immediately jump to armed revolt, but first thoroughly exhaust all manners of peaceful protest and filing of grievances. It is unlikely that it would ever escalate beyond a calm, but adamant, posting of 95 quibbles about various rules issues and minor bugs.
Or
Rules’ issues?
Questions of the non-natives.
Somehow inspired by @Feijoa.
Piet Mondriaan, 1919, Oil on canvas, 86 x 106 cm.
Gemeentemuseum Den Haag (Netherlands).
As a colour-blind player, I bite my thumb and offer the wisdom of “just add a symbol on the tiles it’s that easy”
