在项目中管理多种语言的良好解决方案

We have a need to manage a large number (approx 20+) languages for our application. For previous projects that required fewer languages (3 - 4) we used a simple excel spreadsheet that we sent to various translators and they filled in the translations for the strings. With this many languages and the need to involve multiple translators is there a better solution for managing this data?We have a need to manage a large number (approx