[BOGOSS-67] Technical documentation for translation

[prestonBot]

This issue has been migrated from the Forge. Read the original ticket here.

• Reporter: pablo.borowicz
• Created at: Wed, 6 Dec 2017 15:09:03 +0100

Reverse engineer and document the way translation works on PrestaShop

• Language packages
• Old xml system
• New xlf system
• Database tables, etc

[matks]

Will be probably fixed by @sowbiba ❤️