Global Search on a ‘per language’ level helps to avoid inconsistencies and also would allow for an easier search/replace of words/phrases across multiple resources.
The interface should provide an intelligent interface, where i see the “text to translate” on the left, and the “In translation” space on the right, with comments for teams, and “version control / commits” workflow.
The interface should have full support to keyboard shortcuts to minimize the use of other interfaces (mouse).
Translation hints / suggestions must be available too. To accelerate and minimize errors.
There should be space for the community to improve translations, including synonyms and example sentences to help contextualize.
There should be a tool for search cultured-context terms, in order to understand why such terms exist and how they are used. It could use wikipedia embedded someway (html frames).