In general, a localization project manager with three plus years experience would earn between 60-80K on the client side and 50-65K on the vendor side. To talk in generalities can be misleading though. There are many factors that go into determining salaries that vary according to company and geographic location. It is safe to say that most clients pay 20-25% higher than LSP’s.
In general, client companies pay translators anywhere from 50-75K with benefits for a full time, salaried position. Vendors would be at least 20-25% lower. There are some companies that pay up to 85K for a translator full time. There are only a handul of clients who now have full time salaried translators on staff. Many game companies hire translators. The more common model, though, is to outsource the translation and editing to vendors.