It will not be indexed.
To help SEO in dynamic text, you might use a different approach.
Instead of an array of strings in javascript code, create all the text in the html page, using html elements; and dynamically set its visibility.
For example, see this fiddle http://jsfiddle.net/zVTKq/2/
it shows how to select from a set of div
s placed insiden an invisible div
container, and selectively displays the appropiate text
$('#translated').html($("#translation-en").html());