* fix: replace sh with shell
fix replace terminal with shell
fix replace node with js
fix replace output with shell
fix replace cs with csharp
fix replace c++ with cpp
fix replace c# with csharp
fix replace javasctipt with js
fix replace syntax with js
fix replace unix with shell
fix replace linux with shell
fix replace java 8 with java
fix replace swift4 with swift
fix replace react.js with jsx
fix replace javascriot with js
fix replace javacsript with js
fix replace c++ - with cpp
fix: corrected various typos
fix: replace Algorithm with nothing
fix: replace xaml with xml
fix: replace solidity with nothing
fix: replace c++ with cpp
fix: replace txt with shell
fix: replace code with json and css
fix: replace console with shell
* Translation changes.
Mainly translated the examples and other minor translation changes.
Also 'Hello world!' could be translated to 'Hola mundo!' but i don't like that change.
* fix: added .md to current file name
* Rename guide/spanish/php/php-variables.md to guide/spanish/php/php-variable/index.md
