Help:Extension:Translate/Translation best practices

Things to cover Not decided whether this page should be translated or not. probably some language-specific practices (links) will be needed.
 * usual stuff about variables, links, what to translate
 * links that explain these in more detail
 * encourage message documentation and explain how it works in Translate
 * less important: encourage terminology (and promise we'll have awesome feature to handle it in the future, perhaps even explaining why OmegaWiki is not the way)