How would you transform a pre-existing web app into a multilingual one?

Question

I am going to work on a project where a fairly large web app needs to tweaked to handle several languages. The thing runs with a hand crafted PHP code but it\'s pretty clean

Answer 1

I use hl parameter and gettext combining engine translations already there with own .po which makes new translations and languages appear when engine or my django/gae example adds:

{% get_current_language as LANGUAGE_CODE %}{{ LANGUAGE_CODE }}{% get_available_languages as LANGUAGES %}{% for LANGUAGE in LANGUAGES %}{% ifnotequal LANGUAGE_CODE LANGUAGE.0 %}{{ LANGUAGE.0 }}{% endifnotequal %}{% endfor %}

So keeping from duplicates and fully using translations already there lets forth here the missing eg arabic month names to appear directly either when engine team adds or app