carefully plan what tool or tools you are going to use. For localization purposes, you probably will not need a whole suite of testing tools and trackers-a scripting program with the utility to schedule scripts running might be enough.
Finally, if you have planned carefully, reached the proper conclusions, and your automation analysis and development is good, automating localization testing will be worth the effort, and you will save time and money.
One thing is true: automation is worth the effort in the long-run. Initially, it may take a period of time to develop scripts for an early build of the software. But execution time of the scripts will be short and modification of scripts for later builds will also take less time. If this software is being tested across a lot of platforms/languages, then the financial and time savings will be even greater.