Figuring out whether or not to localize your game, and to what extent, is a personal decision for every developer.
But without the benefit of publisher support, small-scale and independent game makers may be hard-pressed to understand exactly what the process entails, and whether it's a good idea for their project.
Thankfully, at GDC 2014's Localization Summit an indie developer and an experienced game localizer gave a great talk on the topic using the localization of the indie game Expeditions: Conquistador as a case study.
Their brief talk offers key info that indie game developers should know about localization, like: how much does it cost? Will you recoup the investment of the localization? What's the best way to go about it?