Just a quick note.

if you are working with a multi language site and need to do some translation that was missed / skipped in a module.

You might not have to deal with ftp / editors and such. Try the following.

as long as they are outputting the text properly ($this->__('translatable text goes here'))

you can go into your magento admin

click System

Click Configuration

Click Development in the left menu

Expand Translate Inline, then enable it

Save your changes

Now click  System

Configuration

Cache Management

De Select the cache for Translations and save your changes.

Now you can goto your front end and add in translations.